Question

Which expression is equivalent to 36x2 − 25?

(18x)2 + (−5)2
(18x)2 − (5)2
(6x)2 + (−5)2
(6x)2 − (5)2

Answer 1

D

Explanation:

Answer 2

The correct answer is last option (6x)² - (5)²

Explanation:

It is given an expression in variable x,

36x² - 25

To find the equivalent expression of 36x² - 25

We have, 36 = (±6)² and 25 = (±5)²

36x² - 25 can be written as,

36x² - 25 = (±6x)² - (±5)²

From the given options we get the correct answer is last option

(6x)² - (5)²