how do you put (2x+1)(3x-5) into a box method to get 6x^2-7x-5
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(2x+1)(3x-5)
first multiply 2x+1 by 3x then 2x+1 by -5x
=2x*3x+2x*-5+1*3x+1*(-5)
=6x^2-10x+3x-5
=6x^2-7x-5
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