Question

Answer 1

a: \(2x\left(3x^2-4y\right)=6x^3-8xy\)

b: \(4x^2\left(x^4-2x^3-4\right)=4x^6-8x^5-16x^2\)

c: \(\left(2x-5\right)\left(4x+6\right)=8x^2-8x-30\)

d: \(\left(x^2-2xy\right)\left(3x-2y\right)=3x^3-8x^2y+4xy^2\)

Answer 2

\(a,\) \(2x.\left(3x^2-4y\right)\)

\(=6x^3-8xy\)

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

\( =4x^6-8x^5-16x^2\)

\(c,\) \(\left(2x-5\right)\left(4x+6\right)\)

\(=8x^2+12x-20x-30\)

\(d,\) \(\left(x^2-2xy\right)\left(3x-2y\right)\)

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