Question

Solve –5√ x = –15.



A. x = –7
B. x = –9
C. x = 7
D. x = 9

Answer 1

-5√x = -15
   -5       -5
   √x = 3
      x = 9

The answer is D.

Answer 2

Answer:

Option (d) is correct.

$x=9$

Step-by-step explanation:

Given : expression $-5\sqrt{x}=-15$

We have to solve for x.

Consider the given expression  $-5\sqrt{x}=-15$

Divide both side by -5, we have,

$\sqrt{x}=\frac{-15}{-5}$

Simplify, we have,

$\sqrt{x}=3$

Squaring both side, we get,

$(\sqrt{x})^2=3^2$

Simplify, we get,

$x=9$

Thus, Option (d) is correct.