(2x+7)×(3x-4)+(3x+5)×(3x-2)计算
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(2x+7)×(3x-4)+(3x+5)×(3x-2)计算
(2x+7)×(3x-4)+(3x+5)×(3x-2)计算
(2x+7)×(3x-4)+(3x+5)×(3x-2)计算
(6x^2+13x-28)+(9x^2+9x-10)
=15x^2+21x-38
(2x+7)×(3x-4)+(3x+5)×(3x-2)=15x²+22x-38
15x2+22x-38
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