12*4=3+x*x

Solution for 12*4=3+x*x equation:

Simplifying
12 * 4 = 3 + x * x

Multiply 12 * 4
48 = 3 + x * x

Multiply x * x
48 = 3 + x2

Solving
48 = 3 + x2

Solving for variable 'x'.

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

Add '-1x2' to each side of the equation.
48 + -1x2 = 3 + x2 + -1x2

Combine like terms: x2 + -1x2 = 0
48 + -1x2 = 3 + 0
48 + -1x2 = 3

Add '-48' to each side of the equation.
48 + -48 + -1x2 = 3 + -48

Combine like terms: 48 + -48 = 0
0 + -1x2 = 3 + -48
-1x2 = 3 + -48

Combine like terms: 3 + -48 = -45
-1x2 = -45

Divide each side by '-1'.
x2 = 45

Simplifying
x2 = 45

Take the square root of each side:
x = {-6.708203933, 6.708203933}