3(x*x)-2(x*x)+3=84

Solution for 3(x*x)-2(x*x)+3=84 equation:

Simplifying
3(x * x) + -2(x * x) + 3 = 84

Multiply x * x
3(x2) + -2(x * x) + 3 = 84

Multiply x * x
3x2 + -2(x2) + 3 = 84

Reorder the terms:
3 + 3x2 + -2x2 = 84

Combine like terms: 3x2 + -2x2 = 1x2
3 + 1x2 = 84

Solving
3 + 1x2 = 84

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 + 1x2 = 84 + -3

Combine like terms: 3 + -3 = 0
0 + 1x2 = 84 + -3
1x2 = 84 + -3

Combine like terms: 84 + -3 = 81
1x2 = 81

Divide each side by '1'.
x2 = 81

Simplifying
x2 = 81

Take the square root of each side:
x = {-9, 9}