Toán Lớp 8: a)(x+5)²-(x+1).(x-1)=16 b)(2x-1) ²+(x+3) ²-5(x+7)(x-7) c)3.(x-1) ³-3x(x-5)=1 d)(6x-2) ²+(5x-2) ²-4(3x-1)(5x-2)+x ²=1 e)(x-2) ³-x ²(x-6)

Toán Lớp 8: a)(x+5)²-(x+1).(x-1)=16
b)(2x-1) ²+(x+3) ²-5(x+7)(x-7)
c)3.(x-1) ³-3x(x-5)=1
d)(6x-2) ²+(5x-2) ²-4(3x-1)(5x-2)+x ²=1
e)(x-2) ³-x ²(x-6)=4
f)(x-1)(x ²+x+1)-x(x+2)(x-2)=5
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