Tính:

a,2x(x - 1) - 3(x² + 4x) + x(x + 2)

b,(2x - 3) (3x + 5) - (x - 1) (6x + 2) + 3 - 5x

c,(x - y)(x² + xy + y²) - (x + y)(x²- y²)

Complete the sentences with the corect form corect of the Present Continuous

P/l

Thực hiện phép tính:

a,(2x- 4)(x+9)

b,(x² + 4x +3)(x-2)

c,(x-8)(x+8)

d, x²(7x-5)-7(x³- 4x+6)

e,(x²+2)(x²+x+1)

f,(x²+2)(x⁴-2x²+4)

g,(x-g)(x+9)

h,(x-2)(2x³-x²+1)+(x²+1)+(x²-2x²)(1-2)x