2x^2+3=45

Solution for 2x^2+3=45 equation:

Simplifying
2x2 + 3 = 45

Reorder the terms:
3 + 2x2 = 45

Solving
3 + 2x2 = 45

Solving for variable 'x'.

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

Add '-3' to each side of the equation.
3 + -3 + 2x2 = 45 + -3

Combine like terms: 3 + -3 = 0
0 + 2x2 = 45 + -3
2x2 = 45 + -3

Combine like terms: 45 + -3 = 42
2x2 = 42

Divide each side by '2'.
x2 = 21

Simplifying
x2 = 21

Take the square root of each side:
x = {-4.582575695, 4.582575695}