(x+)(x-)=x2-7x-78

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Solution for (x+)(x-)=x2-7x-78 equation: 



(x+)(x-)=x2-7x-78

We move all terms to the left:

(x+)(x-)-(x2-7x-78)=0

We add all the numbers together, and all the variables

-(+x^2-7x-78)+(+x)(+x)=0

We get rid of parentheses

-x^2+7x+(+x)(+x)+78=0

We multiply parentheses ..

-x^2+(+x^2)+7x+78=0

We add all the numbers together, and all the variables

-1x^2+(+x^2)+7x+78=0

We get rid of parentheses

-1x^2+x^2+7x+78=0

We add all the numbers together, and all the variables

7x+78=0

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

7x=-78

x=-78/7

x=-11+1/7

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