We have,4a2 – 9= (2a)2 – (3)2By using the formula a2 – b2 = (a + b)(a – b)We get,4a2 – 9 = (2a)2 – (3)2= (2a + 3)(2a – 3)

Q2 of 137 Page 100

Factories:
4a² – 9

We have,

4a² – 9

= (2a)² – (3)²

By using the formula a² – b² = (a + b)(a – b)

We get,

4a² – 9 = (2a)² – (3)²

= (2a + 3)(2a – 3)

Factories:

x² – x(a + 2b) + 2ab

Factories:

x² – 36

Factories:

81 – 49x²

Factories:

4x² – 9y²

Factories:4a2 – 9