Question

tính 

a, 6x²(3x² - 4x + 5)

b, ( x - 2y ) ( 3xy + 6y² +x)

c, ( 18x⁴y³ - 24x³y⁴ + 12x³y³ ) : ( -6x²y³ ) 

d, [4( x - y )⁵ + 2( x - y )³ - 3( x-y )² ] : ( y - x )²

Answer 1

\(a,=18x^4-24x^3+30x\\ b,=3x^2y+6xy^2+x^2-6xy^2-12y^3-2xy=3x^2y+x^2-12y^3-2xy\\ c,=-3x^2+4xy-2x\\ d,=\left(x-y\right)^2\left[4\left(x-y\right)^3+2\left(x-y\right)-3\right]:\left(x-y\right)^2\\ =4\left(x-y\right)^3+2\left(x-y\right)-3\)

Answer 2

a: \(=18x^4-24x^3+30x^2\)

b: \(=3x^2y+6xy^2+x^2-6xy^2-12y^3-2xy\)

\(=x^2-12y^3+3x^2y-2xy\)

Answer 3

a, \(=18x^4-24x^3+30x^2\)

b, \(=3x^2y+6xy^2+x^2-6xy^2-12y^3-2xy=3x^2y+x^2-12y^3-2xy\)

c, \(=-3x^2+4xy-2x\)

d, \(=4\left(x-y\right)^3+2\left(x-y\right)-3=4\left(x^3-3x^2y+3xy^2-y^3\right)+2x-2y-3=4x^3-12x^2y+12xy^2-4y^3+2x-2y-3\)