(y+7)(y+7)=y

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Solution for (y+7)(y+7)=y equation: 



(y+7)(y+7)=y

We move all terms to the left:

(y+7)(y+7)-(y)=0

We add all the numbers together, and all the variables

-1y+(y+7)(y+7)=0

We multiply parentheses ..

(+y^2+7y+7y+49)-1y=0

We get rid of parentheses

y^2+7y+7y-1y+49=0

We add all the numbers together, and all the variables

y^2+13y+49=0

a = 1; b = 13; c = +49;
Δ = b2-4ac
Δ = 132-4·1·49
Δ = -27
Delta is less than zero, so there is no solution for the equation

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