(4a-b²)x(-2b) 5abx(2a-b+0.2)(X-6)x(X-3)(x-2)(x²+4)

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(4a-b²)x(-2b) 5abx(2a-b+0.2)(X-6)x(X-3)(x-2)(x²+4)
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(4a-b²)x(-2b) 5abx(2a-b+0.2)(X-6)x(X-3)(x-2)(x²+4)
(4a-b²)x(-2b)
5abx(2a-b+0.2)
(X-6)x(X-3)
(x-2)(x²+4)

(4a-b²)x(-2b) 5abx(2a-b+0.2)(X-6)x(X-3)(x-2)(x²+4)
4ax(-2b)+b^2x2b= -8ab+2b^3
5abx2a-5ab^2+5abx0.2=10a^2b-5ab^2+ab
x^2-3x-6x+18=x^2-9x+18
x^3+4x-2x^2-8=x^3-2x^2+4x-8