Question

Simplify: 4x2(x+2)+3x(5x2+2x-6)-5(3x2-4x).
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Answer 1

4x2(x+2) +3x(5x2+2x-6) -5(3x2-4x).

= 4x3 + 8x2 + 15x3 + 6x2 – 18x – 15x2 + 20x.

= 4x3 + 15x3 + 8x2 + 6x2 – 15x2 – 18x + 20x.

= 19x3 - x2 + 2x.

Answer: 19x3 - x2 + 2x

Answer 2

Answer:

$19x^3-x^2+2x$

Step-by-step explanation:

by simplifying

$4x^2(x+2)+3x(5x^2+2x-6)-5(3x^2-4x)\\=4x^3+8x^2+15x^3+6x^2-18x-15x^2+20x\\=19x^3-x^2+2x$