Question

tính nhân

a, (x-1)(-2x^3+3x+4)=?

b,(-x² +3)(4x²y+y³)(1-2xy)=

Answer 1

a, \(\left(x-1\right)\left(-2x^3+3x+4\right)\)

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

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

Chúc bạn học tốt!!!

Answer 2

a,\(\left(x-1\right)\left(-2x^3+3x+4\right)=-2x^4+3x^2+4x+2x^3-3x-4=-2x^4+2x^3+3x^2+x-4\)

b,\(\left(-x^2+3\right)\left(4x^2y+y^3\right)\left(1-2xy\right)=\left(-4x^4y-x^2y^3+12x^2y+3y^3\right)\left(1-2xy\right)=-4x^4-x^2y^3+12x^2y+3y^3+8x^5y^2+2x^3y^4-24x^3y^2-6xy^4\)

Answer 3

a) \(\left(x-1\right)\left(-2x^3+3x+4\right)\)

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

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