因式分解:(20x-15)(7x-2)+(4x-3)(15-35x)
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因式分解:(20x-15)(7x-2)+(4x-3)(15-35x)因式分解:(20x-15)(7x-2)+(4x-3)(15-35x)因式分解:(20x-15)(7x-2)+(4x-3)(15-35
因式分解:(20x-15)(7x-2)+(4x-3)(15-35x)
因式分解:(20x-15)(7x-2)+(4x-3)(15-35x)
因式分解:(20x-15)(7x-2)+(4x-3)(15-35x)
(20x-15)(7x-2)+(4x-3)(15-35x)
=5(4x-3)(7x-2)+(4x-3)(15-35x)
=(4x-3)(35x-10)+(4x-3)(15-35x)
=(4x-3)(35x-10+15-35x)
=5(4x-3)
(20x-15)(7x-2)+(4x-3)(15-35x)
=5(4-3x)(7x-2)-3(4x-3)(7x-2)
=2(4x-3)(7x-2)
5(4x-3)(7x-2)+ 5(4x-3)(3-7x)
=5(4x-3)
(20x-15)(7x-2)+(4x-3)(15-35x)
=5(4x-3)(7x-2)+(4x-3)(15-35x)
=(4x-3)(35x-10+15-35x)
=5(4x-3)
(20x-15)(7x-2)+(4x-3)(15-35x)
=5(4-3x)(7x-2)-3(4x-3)(7x-2)
=2(4x-3)(7x-2)
(20x-15)(7x-2)+(4x-3)(15-35x)
=20x(7x-2)-15(7x-2)+4x(15-35x)-3(15-35x)
=20x-15
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