factorise the following (a+b)2 -9(a_b)2
Answers
Answered by
1
Step-by-step explanation:
(a^2-b^2)(-16) is the correct answer
Answered by
1
Answer:
Using the identity a² -b² =(a+b)(a-b)
(a+b)² -(3(a-b))²
(a+b+3(a-b) x(a+b-3(a-b)
(a+b+3a-3b)(a+b-3a+3b)
(4a-2b)(4b-2a)
Step-by-step explanation:
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