(2x-3)(5x的平方-x+2)

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(2x-3)(5x的平方-x+2)
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(2x-3)(5x的平方-x+2)
(2x-3)(5x的平方-x+2)

(2x-3)(5x的平方-x+2)
(2x-3)(5x²-x+2)
=10x^3-2x²+4x-15x²+3x-6
=10x^3-17x²+7x-6

(2x-3)(5x²-x+2)
=2x﹙5x²-x+2﹚-3﹙5x²-x+2﹚
=10x³-2x²+4x-15x²+3x-6
=10x³-17x²+7x-6.