Question

Bài 1

a) 6xy³(3x³y-\(\dfrac{1}{2}\)x²+xy)

b) (5x-2y).(x²-xy+1)

c) (2x-3).(x+2)-(4x-2).(x-5)

Bài 2

a) (x+y)²+(x-y)²-2x⁵

b) (x+2y).(x²-2xy+4y²)-(x-2y).(x²+2xy+4y²)+2y³

Bài 3

a) 4x⁴-9x²

b) 2x³-8x²+8x

c) 6xy+5x-5y-3x²-3y²

Answer 1

đề bài đâu