Question

1)(a-3)^2=
2)(2x+y)^2=
3)(5b-4x)(5b+4x)=


1)4a(a-2)-(a-4)^2=

Answer 1

1)(a-3)²=a²-6a+9

2)(2x+y)²=4x²+4xy+y²

3)(5b-4x)(5b+4x)=25b²-16x²

1)4a(a-2)-(a-4)²=4a²-8a-a²+8a-16=3a²+8a

Answer 2

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