Bài 1: thực hiện phép tínha, 2xy(x^2 + xy - 3y^2)b, (x+2)(3x^2 - 4x)c, (x^3 + 3x^2 - 8x - 20) : (x + 2)d, (4x^2 - 4x - 4) : (x+4)e, (2x^3 - 3x^2 + x - 2) : (x + 5) f, (x+y)^2 + (x-y)^2 - 2(x+y)(x-y)g, (a+b)^3 - (a-b)^3 - 2b^3h, (x - y)(x + y)(x^2 + y^2)(x^4 + y^4)i, 2x^2(x - 2) + 3x(x^2 - x - 2) - 5(3 - x^2)k, (x - 1)(x - 3) - (4 - x)(2x + 1) - 3x^2 + 2x - 5l, (x^4 - x^3 - 3x^2 + x + 2) : (x^2 -...
Đọc tiếp
Bài 1: thực hiện phép tính
a, 2xy(x^2 + xy - 3y^2)
b, (x+2)(3x^2 - 4x)
c, (x^3 + 3x^2 - 8x - 20) : (x + 2)
d, (4x^2 - 4x - 4) : (x+4)
e, (2x^3 - 3x^2 + x - 2) : (x + 5)
f, (x+y)^2 + (x-y)^2 - 2(x+y)(x-y)
g, (a+b)^3 - (a-b)^3 - 2b^3
h, (x - y)(x + y)(x^2 + y^2)(x^4 + y^4)
i, 2x^2(x - 2) + 3x(x^2 - x - 2) - 5(3 - x^2)
k, (x - 1)(x - 3) - (4 - x)(2x + 1) - 3x^2 + 2x - 5
l, (x^4 - x^3 - 3x^2 + x + 2) : (x^2 - 1)
