Question

factorise (2+3a) square - 36a square​

Answer 1

Answer:

We know the identity that

a² - b² = ( a + b) ( a - b)

Therefore

(2+3a)² - 36a²

= (2+3a)² - (6a)²

= (2+3a+6a) (2+3a-6a)

= (2+9a) (2-3a)

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Answer 2

Step-by-step explanation:

(2+3a)^2-36a^2

=2^2+(3a)^2+2(2)(3a)-36a^2

=4+9a^2+12a-36a^2

=4+12a-27a^2