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Simplifying
3x * 3x + 4 = 19
Reorder the terms for easier multiplication:
3 * 3x * x + 4 = 19
Multiply 3 * 3
9x * x + 4 = 19
Multiply x * x
9x2 + 4 = 19
Reorder the terms:
4 + 9x2 = 19
Solving
4 + 9x2 = 19
Solving for variable 'x'.
Move all terms containing x to the left, all other terms to the right.
Add '-4' to each side of the equation.
4 + -4 + 9x2 = 19 + -4
Combine like terms: 4 + -4 = 0
0 + 9x2 = 19 + -4
9x2 = 19 + -4
Combine like terms: 19 + -4 = 15
9x2 = 15
Divide each side by '9'.
x2 = 1.666666667
Simplifying
x2 = 1.666666667
Take the square root of each side:
x = {-1.290994449, 1.290994449}
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