Question

Find the value of x in the equation 2√ x + 20 = 15 + 3√ x

A. 16
B. –5
C. 25
D. 1

Answer 1

The answer is C. 25

Answer 2

Answer: C. 25

Explanation:

Since, Here given expression,

2√ x + 20 = 15 + 3√ x

⇒2√ x + 20 - 15 = 3√ x (By subtracting 15 on both sides)

⇒2√ x + 5 = 3√ x

⇒ 5 = 3√ x - 2√ x (By subtracting 2 √ x on both sides)

⇒5 = ( 3-2)√ x

⇒√ x = 5

⇒x = 25 (By squaring both sides )

Therefore, Option C is correct.