Factorise 4(2a+b)^2 - (a-b)^2
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Distribute:=16a^2+16ab+4b^2+−a^2+2ab+−b^2Combine Like Terms:=16a^2+16ab+4b^2+−a^2+2ab+−b^2=(16a^2+−a^2)+(16ab+2ab)+(4b^2+−b^2)=15a^2+18ab+3b^2
Answer:=15a^2+18ab+3b^2