Question

Thực hiện phép nhân đơn thức

(3x²-2x-x-3).(x²-4x+2)

(9x^2+6x+4).(3x-2)

Answer 1

a,

\(\left(3x^2-2x-x-3\right)\left(x^2-4x+2\right)\)

\(=\left(3x^2-3x-3\right)\left(x^2-4x+2\right)\)

\(=3x^4-12x^3+6x^2-3x^3+8x^2-4x-3x^2+12x-6\)

\(=3x^4-15x^3+11x^2+8x-6\)

Answer 2

b,\(\left(9x^2+6x+4\right)\left(3x-2\right)\)

\(=27x^3+18x^2+12x-18x^2-12x-8\)

\(=27x^3-8\)