Question

Find the root of polynomial x square + 2x -15. It must be a correct explanation

Answer 1

Answer:

see the attachment for the solution.

$..$

Answer 2

Answer:

$⟹ {x}^{2} + 2x - 15 = 0$

$⟹ {x}^{2} + 5x - 3x - 15 = 0$

$⟹x(x + 5) - 3(x + 5) = 0$

$⟹(x - 3)(x + 5) = 0$

$⟹x - 3 = 0 , x + 5 = 0$

$⟹x = 3 , x = - 5$