Quadratic equations such as this one can be solved by completing the square. -18 18 0 0 6x x 2 0 18 6x x 2 0 18. B 22 32 b 2 2 - 3 2.
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To create a trinomial square on the left side of the equation find a value that is equal to the square of half of b b. Take the coefficient of x which is 6 divide by two giving 3 and finally square it giving 9 Add 9 to both sides of the equation. A x 2 b x c 0. Subtract 8 from both side of the equation.