5*2+5x*x=15

Solution for 5*2+5x*x=15 equation:

Simplifying
5 * 2 + 5x * x = 15

Multiply 5 * 2
10 + 5x * x = 15

Multiply x * x
10 + 5x2 = 15

Solving
10 + 5x2 = 15

Solving for variable 'x'.

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

Add '-10' to each side of the equation.
10 + -10 + 5x2 = 15 + -10

Combine like terms: 10 + -10 = 0
0 + 5x2 = 15 + -10
5x2 = 15 + -10

Combine like terms: 15 + -10 = 5
5x2 = 5

Divide each side by '5'.
x2 = 1

Simplifying
x2 = 1

Take the square root of each side:
x = {-1, 1}