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Simplifying
343 = 9(x2 + -2)
Reorder the terms:
343 = 9(-2 + x2)
343 = (-2 * 9 + x2 * 9)
343 = (-18 + 9x2)
Solving
343 = -18 + 9x2
Solving for variable 'x'.
Move all terms containing x to the left, all other terms to the right.
Add '-9x2' to each side of the equation.
343 + -9x2 = -18 + 9x2 + -9x2
Combine like terms: 9x2 + -9x2 = 0
343 + -9x2 = -18 + 0
343 + -9x2 = -18
Add '-343' to each side of the equation.
343 + -343 + -9x2 = -18 + -343
Combine like terms: 343 + -343 = 0
0 + -9x2 = -18 + -343
-9x2 = -18 + -343
Combine like terms: -18 + -343 = -361
-9x2 = -361
Divide each side by '-9'.
x2 = 40.11111111
Simplifying
x2 = 40.11111111
Take the square root of each side:
x = {-6.333333333, 6.333333333}
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