Question

The roots of the quadratic equation x2+7x= 0 are A.0, -7 B. 7, -7 C. 0, 7 D. -7, -7​

Answer 1

Answer: x = 0, - 7. (A)

Explanation:

x^2 + 7x + 0 = 0

By factoring the LHS,

⇒ x(x + 7) = 0

Either, x = 0/(x + 7) or x + 7 = 0/x

Either x = 0 or x = - 7.

So, x = 0, - 7.