Factorise 4(2a+b)^2 - (a-b)^2
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=4{(2a)²+(b)²+2×2a×b-{a²+b²-2×a×b}
=4(4a²+b²+4ab)-(a²+b²-2ab)
=16a²+4b²+16ab-a²-b²+2ab
=16a²-a²+4b²-b²+16ab+2ab
=15a²+3b²+18ab
Hope my answer is right!
Answer:
your answer is 3(5a+b) (a+b)
Step-by-step explanation:
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