(2x减1)(3x加5)减2(x减1)(4x加3)

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(2x减1)(3x加5)减2(x减1)(4x加3)(2x减1)(3x加5)减2(x减1)(4x加3)(2x减1)(3x加5)减2(x减1)(4x加3)(2x-1)(3x+5)-2(x+1)(4x+3)

(2x减1)(3x加5)减2(x减1)(4x加3)
(2x减1)(3x加5)减2(x减1)(4x加3)

(2x减1)(3x加5)减2(x减1)(4x加3)
(2x-1)(3x+5)-2(x+1)(4x+3)
=6x²+7x-5-2(4x²+7x+3)
=6x²+7x-5-8x²-14x-6
=-2x²-7x-11

(2x-1)(3x+5)-2(x-1)(4x+3)
=(6x²+7x-5)-2(4x²-x-3)
=6x²+7x-5-8x²+2x+6
=-2x²+9x+1