7x^2+4-9=0

Solution for 7x^2+4-9=0 equation:

Simplifying
7x2 + 4 + -9 = 0

Reorder the terms:
4 + -9 + 7x2 = 0

Combine like terms: 4 + -9 = -5
-5 + 7x2 = 0

Solving
-5 + 7x2 = 0

Solving for variable 'x'.

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

Add '5' to each side of the equation.
-5 + 5 + 7x2 = 0 + 5

Combine like terms: -5 + 5 = 0
0 + 7x2 = 0 + 5
7x2 = 0 + 5

Combine like terms: 0 + 5 = 5
7x2 = 5

Divide each side by '7'.
x2 = 0.7142857143

Simplifying
x2 = 0.7142857143

Take the square root of each side:
x = {-0.845154255, 0.845154255}