x*x+4x=77

Solution for x*x+4x=77 equation:

Simplifying
x * x + 4x = 77

Multiply x * x
x2 + 4x = 77

Reorder the terms:
4x + x2 = 77

Solving
4x + x2 = 77

Solving for variable 'x'.

Reorder the terms:
-77 + 4x + x2 = 77 + -77

Combine like terms: 77 + -77 = 0
-77 + 4x + x2 = 0

Factor a trinomial.
(-11 + -1x)(7 + -1x) = 0

Subproblem 1
Set the factor '(-11 + -1x)' equal to zero and attempt to solve:

Simplifying
-11 + -1x = 0

Solving
-11 + -1x = 0

Move all terms containing x to the left, all other terms to the right.

Add '11' to each side of the equation.
-11 + 11 + -1x = 0 + 11

Combine like terms: -11 + 11 = 0
0 + -1x = 0 + 11
-1x = 0 + 11

Combine like terms: 0 + 11 = 11
-1x = 11

Divide each side by '-1'.
x = -11

Simplifying
x = -11
Subproblem 2
Set the factor '(7 + -1x)' equal to zero and attempt to solve:

Simplifying
7 + -1x = 0

Solving
7 + -1x = 0

Move all terms containing x to the left, all other terms to the right.

Add '-7' to each side of the equation.
7 + -7 + -1x = 0 + -7

Combine like terms: 7 + -7 = 0
0 + -1x = 0 + -7
-1x = 0 + -7

Combine like terms: 0 + -7 = -7
-1x = -7

Divide each side by '-1'.
x = 7

Simplifying
x = 7
Solution
x = {-11, 7}