(4+y)(4+y)-(y*y)=80

Solution for (4+y)(4+y)-(y*y)=80 equation:

(4+y)(4+y)-(y*y)=80

We move all terms to the left:

(4+y)(4+y)-(y*y)-(80)=0

We add all the numbers together, and all the variables

(y+4)(y+4)-(+y*y)-80=0

We get rid of parentheses

(y+4)(y+4)-y*y-80=0

We multiply parentheses ..

(+y^2+4y+4y+16)-y*y-80=0

Wy multiply elements

(+y^2+4y+4y+16)-1y^2-80=0

We get rid of parentheses

y^2-1y^2+4y+4y+16-80=0

We add all the numbers together, and all the variables

8y-64=0

We move all terms containing y to the left, all other terms to the right

8y=64

y=64/8

y=8