(-4x+1)(2x+3)-(-8x)(x+2)

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(-4x+1)(2x+3)-(-8x)(x+2)
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(-4x+1)(2x+3)-(-8x)(x+2)
(-4x+1)(2x+3)-(-8x)(x+2)

(-4x+1)(2x+3)-(-8x)(x+2)
(-4x+1)(2x+3)-(-8x)(x+2)
=-8x^2-12x+2x+3+8x(x+2)
=-8x^2-12x+2x+3+8x^2+16x
=6x+3

原式=-8X的平方-10X+3+8X的平方+16X
=6X+3

(-4x+1)(2x+3)-(-8x)(x+2)
=(-8x²)-12x+2x+3+8x²+16x
=6x+3
=3(2x+1)

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