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Simplifying
4x2 + 7x2 + -18 = 0
Reorder the terms:
-18 + 4x2 + 7x2 = 0
Combine like terms: 4x2 + 7x2 = 11x2
-18 + 11x2 = 0
Solving
-18 + 11x2 = 0
Solving for variable 'x'.
Move all terms containing x to the left, all other terms to the right.
Add '18' to each side of the equation.
-18 + 18 + 11x2 = 0 + 18
Combine like terms: -18 + 18 = 0
0 + 11x2 = 0 + 18
11x2 = 0 + 18
Combine like terms: 0 + 18 = 18
11x2 = 18
Divide each side by '11'.
x2 = 1.636363636
Simplifying
x2 = 1.636363636
Take the square root of each side:
x = {-1.279204298, 1.279204298}
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