September 2018 1 16 Report

a)(x+5)(x+2)-3(4x-3)=(x-5)²

b)12-2(x-1)²=4(x-2)-(x-3)(2x-5)

c)(x-3)(x+3)-(2x-1)²=x(6-3x)-9

d)3(x+2)²+(2x-1)²-7(x+3)(x-3)=28


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