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2-79.

Copy each of the area models below and fill in the missing dimensions and areas. Then write the entire area as a product equivalent to the area as a sum.

1.  $2xy$ $8y$ $x$

Try to find a way to factor what is inside of the boxes, then it is possible to write the area as a product of its sum.

$2xy+8y=2y(x+4)$

1.  $x^2$ $8x$ $+5$

$(x+8)(x+5)=x^2+13x+40$

1.  $-3xy$ $-4$ $-8z$ $-20$ $-3y$

$(x−4)(2z−3y+5)=2xz-3xy+5x-$
$8z+12y−20$.

1.  $x$ $x^2$ $6$