Question

1) (x-4)^2-16
2) 10a+(a-5)^2
3) (3m-7n)^2-(3m+7n)^2
4)(6a-3b)^2+(9a+2b)^2
5) b(b-3)-(b-4)^2

Answer 1

1) (x-4)²-16
=x×(x-8)
2) 10a+(a-5)²
=a²+25
3) (3m-7n)²-(3m+7n)²
=-84mn
4) (6a-3b)²+(9a+2b)²
=117a²+13b²
5) b(b-3)-(b-4)²
=5b-16

Answer 2

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