Question

Factor the expression. 4b2 – 9

(2b – 3)(2b – 3)
(2b + 3)(2b + 3)
(3b + 2)(3b – 2)
(2b + 3)(2b – 3)

Answer 1

Let's do

• 4b²-9
• (2b)²-3²

★a²-b²=(a+b)(a-b)

• (2b+3)(2b-3)

Hence option D is correct

Answer 2

The 4th answer is correct

Explanation:

We know that,

( a - b ) ² = ( a + b ) ( a - b )

In the same way, let us solve this sum.

4b² - 9

2²b² - 3²

( 2b - 3 ) ( 2b + 3 )

Therefore, 4th answer is correct.