Question

Solve.
1) Check whether x = -3 is the root of the quadratic equation
x2 + 4 = 13.​

Answer 1

Answer:

x = 3, -3 are the roots of $x^{2}$ + 4 = 13

Explanation:

$x^{2}$ = 13 - 4 (Move all terms not containing x to the right side)

$x^{2}$ = 9

then...

x = ± $\sqrt{9}$

x = ± $\sqrt{3^2}$

x = +3, -3

Hope this helps !!