Question 109629
(5x-8)(x-7)
First : {{{(5x)(x)=5x^2}}}
Outer : {{{(5x)(-7)=-35x}}}
Inner : {{{(-8)(x)=-8x}}}
Last : {{{(-8)(-7)=56}}}
Now add it all together,
{{{(5x-8)(x-7)=5x^2+(-35x)+(-8x)+56}}}
{{{(5x-8)(x-7)=5x^2-43x+56}}}