Toán Lớp 8: Bài 2: Rút gọn biểu thức
a) (x +1)^2 + x(2-x)
b) (x-2)^3 – (x-2)(x^2 + 2x+4)
c) (x+3)^2 +2(x+3)(x-3) + (3-x)^2
d) (2x-1)^2 – (2x-3)(2x+1)
e) 4(x-1)(x+3)-(2x -1)(2x+1)
f) (2x-1)^3 – 8x^3 + 7
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Toán Lớp 8: Bài 2: Rút gọn biểu thức
a) (x +1)^2 + x(2-x)
b) (x-2)^3 – (x-2)(x^2 + 2x+4)
c) (x+3)^2 +2(x+3)(x-3) + (3-x)^2
d) (2x-1)^2 – (2x-3)(2x+1)
e) 4(x-1)(x+3)-(2x -1)(2x+1)
f) (2x-1)^3 – 8x^3 + 7
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