691=x*4x

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Solution for 691=x*4x equation:


Simplifying
691 = x * 4x

Reorder the terms for easier multiplication:
691 = 4x * x

Multiply x * x
691 = 4x2

Solving
691 = 4x2

Solving for variable 'x'.

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

Add '-4x2' to each side of the equation.
691 + -4x2 = 4x2 + -4x2

Combine like terms: 4x2 + -4x2 = 0
691 + -4x2 = 0

Add '-691' to each side of the equation.
691 + -691 + -4x2 = 0 + -691

Combine like terms: 691 + -691 = 0
0 + -4x2 = 0 + -691
-4x2 = 0 + -691

Combine like terms: 0 + -691 = -691
-4x2 = -691

Divide each side by '-4'.
x2 = 172.75

Simplifying
x2 = 172.75

Take the square root of each side:
x = {-13.143439428, 13.143439428}

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