# arrow_back Solve for $x$ in the quadratic equation $x^{2}+10 x+8=0$

22 views
Solve for $x$ in the quadratic equation $x^{2}+10 x+8=0$

$x=-0,88$ or $x=-9,12$

Explanation:

\begin{aligned} x^{2} &+10 x+8=0 \\ x &=\frac{-b \pm \sqrt{b^{2}-4 a c}}{2 a} \\ &=\frac{-10 \pm \sqrt{10^{2}-4(1)(8)}}{2(1)} \\ &=\frac{-10 \pm \sqrt{68}}{2} \\ x &=-0,88 \text { or } x=-9,12 \end{aligned}

by Platinum
(118,646 points)

## Related questions

Notice: Undefined index: avatar in /home/customer/www/mathsgee.com/public_html/qa-theme/AVEN/qa-theme.php on line 993
Solve the quadratic equation $x^2-6x=0$
Solve the quadratic equation $x^2-6x=0$Solve the quadratic equation $x^2-6x=0$ ...
close

Notice: Undefined index: avatar in /home/customer/www/mathsgee.com/public_html/qa-theme/AVEN/qa-theme.php on line 993
Solve the following quadratic equation by completing the square $$9 x^{2}+12 x-3=0$$
Solve the following quadratic equation by completing the square $$9 x^{2}+12 x-3=0$$Solve the following quadratic equation by completing the square $$9 x^{2}+12 x-3=0$$ ...
close

Notice: Undefined index: avatar in /home/customer/www/mathsgee.com/public_html/qa-theme/AVEN/qa-theme.php on line 993
Using the factoring method, solve the quadratic equation: $2 x^{2}-3 x=0$
Using the factoring method, solve the quadratic equation: $2 x^{2}-3 x=0$Using the factoring method, solve the quadratic equation: $2 x^{2}-3 x=0$ ...
close

Notice: Undefined index: avatar in /home/customer/www/mathsgee.com/public_html/qa-theme/AVEN/qa-theme.php on line 993
Using the factoring method, solve the quadratic equation: $x^{2}+4 x+4=0$
Using the factoring method, solve the quadratic equation: $x^{2}+4 x+4=0$Using the factoring method, solve the quadratic equation: $x^{2}+4 x+4=0$ ...
close

Notice: Undefined index: avatar in /home/customer/www/mathsgee.com/public_html/qa-theme/AVEN/qa-theme.php on line 993
Solve the quadratic equation $x^{2}+7 x+12=0$ by factorization method.
Solve the quadratic equation $x^{2}+7 x+12=0$ by factorization method.Solve the quadratic equation $x^{2}+7 x+12=0$ by factorization method. ...
close

Notice: Undefined index: avatar in /home/customer/www/mathsgee.com/public_html/qa-theme/AVEN/qa-theme.php on line 993
Using the quadratic formula, solve the quadratic equation: $x-31 / x=0$
Using the quadratic formula, solve the quadratic equation: $x-31 / x=0$Using the quadratic formula, solve the quadratic equation: $x-31 / x=0$ ...
close

Notice: Undefined index: avatar in /home/customer/www/mathsgee.com/public_html/qa-theme/AVEN/qa-theme.php on line 993
Solve the quadratic equation $3x^2-10x+3=0$
Solve the quadratic equation $3x^2-10x+3=0$Solve the quadratic equation $3x^2-10x+3=0$ ...
close

Notice: Undefined index: avatar in /home/customer/www/mathsgee.com/public_html/qa-theme/AVEN/qa-theme.php on line 993
(a) By completing the square, find in terms of the constant $k$ the roots of the equation $x^{2}+k x-6=0$
(a) By completing the square, find in terms of the constant $k$ the roots of the equation $x^{2}+k x-6=0$(a) By completing the square, find in terms of the constant $k$ the roots of the equation \ x^{2}+k x-6=0 \ (b) Hence find the exact roots of the ...
close

Notice: Undefined index: avatar in /home/customer/www/mathsgee.com/public_html/qa-theme/AVEN/qa-theme.php on line 993
Solve $x^{2}+\left(\frac{4}{3}\right) x=0$ by completing the square
Solve $x^{2}+\left(\frac{4}{3}\right) x=0$ by completing the squareSolve $x^{2}+\left(\frac{4}{3}\right) x=0$ by completing the square ...
close

Notice: Undefined index: avatar in /home/customer/www/mathsgee.com/public_html/qa-theme/AVEN/qa-theme.php on line 993
Solve $x^{2}+5 x+2=0$ by completing the square
Solve $x^{2}+5 x+2=0$ by completing the squareSolve $x^{2}+5 x+2=0$ by completing the square ...
close

Notice: Undefined index: avatar in /home/customer/www/mathsgee.com/public_html/qa-theme/AVEN/qa-theme.php on line 993
Solve $x^{2}-2 x-2=0$ by completing the square
Solve $x^{2}-2 x-2=0$ by completing the squareSolve &nbsp;$x^{2}-2 x-2=0$ &nbsp;by completing the square ...
close

Notice: Undefined index: avatar in /home/customer/www/mathsgee.com/public_html/qa-theme/AVEN/qa-theme.php on line 993
Solve $x^{2}+6 x+2=0$ by completing the square
Solve $x^{2}+6 x+2=0$ by completing the squareSolve $x^{2}+6 x+2=0$ by completing the square ...
close

Notice: Undefined index: avatar in /home/customer/www/mathsgee.com/public_html/qa-theme/AVEN/qa-theme.php on line 993
Solve the quadratic equation $3 x^{2}+2 x-8=0$
Solve the quadratic equation $3 x^{2}+2 x-8=0$Solve the quadratic equation $3 x^{2}+2 x-8=0$ ...
close

Notice: Undefined index: avatar in /home/customer/www/mathsgee.com/public_html/qa-theme/AVEN/qa-theme.php on line 993
Using the quadratic formula, solve the quadratic equation: $x^{2}-9 x+14=0$
Using the quadratic formula, solve the quadratic equation: $x^{2}-9 x+14=0$Using the quadratic formula, solve the quadratic equation: $x^{2}-9 x+14=0$ ...
Solve $t^{2}+2 t=15$ by completing the square
Solve $t^{2}+2 t=15$ by completing the squareSolve $t^{2}+2 t=15$ by completing the square ...