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Simplifying
3x2 + -21 = -2x2 + -3
Reorder the terms:
-21 + 3x2 = -2x2 + -3
Reorder the terms:
-21 + 3x2 = -3 + -2x2
Solving
-21 + 3x2 = -3 + -2x2
Solving for variable 'x'.
Move all terms containing x to the left, all other terms to the right.
Add '2x2' to each side of the equation.
-21 + 3x2 + 2x2 = -3 + -2x2 + 2x2
Combine like terms: 3x2 + 2x2 = 5x2
-21 + 5x2 = -3 + -2x2 + 2x2
Combine like terms: -2x2 + 2x2 = 0
-21 + 5x2 = -3 + 0
-21 + 5x2 = -3
Add '21' to each side of the equation.
-21 + 21 + 5x2 = -3 + 21
Combine like terms: -21 + 21 = 0
0 + 5x2 = -3 + 21
5x2 = -3 + 21
Combine like terms: -3 + 21 = 18
5x2 = 18
Divide each side by '5'.
x2 = 3.6
Simplifying
x2 = 3.6
Take the square root of each side:
x = {-1.897366596, 1.897366596}
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