14=3.5x(x)

Solution for 14=3.5x(x) equation:

Simplifying
14 = 3.5x(x)

Multiply x * x
14 = 3.5x2

Solving
14 = 3.5x2

Solving for variable 'x'.

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

Add '-3.5x2' to each side of the equation.
14 + -3.5x2 = 3.5x2 + -3.5x2

Combine like terms: 3.5x2 + -3.5x2 = 0.0
14 + -3.5x2 = 0.0

Add '-14' to each side of the equation.
14 + -14 + -3.5x2 = 0.0 + -14

Combine like terms: 14 + -14 = 0
0 + -3.5x2 = 0.0 + -14
-3.5x2 = 0.0 + -14

Combine like terms: 0.0 + -14 = -14
-3.5x2 = -14

Divide each side by '-3.5'.
x2 = 4

Simplifying
x2 = 4

Take the square root of each side:
x = {-2, 2}