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Simplifying (x + -3)(x + -3) = x * x + (-3)(-3) Reorder the terms: (-3 + x)(x + -3) = x * x + (-3)(-3) Reorder the terms: (-3 + x)(-3 + x) = x * x + (-3)(-3) Multiply (-3 + x) * (-3 + x) (-3(-3 + x) + x(-3 + x)) = x * x + (-3)(-3) ((-3 * -3 + x * -3) + x(-3 + x)) = x * x + (-3)(-3) ((9 + -3x) + x(-3 + x)) = x * x + (-3)(-3) (9 + -3x + (-3 * x + x * x)) = x * x + (-3)(-3) (9 + -3x + (-3x + x2)) = x * x + (-3)(-3) Combine like terms: -3x + -3x = -6x (9 + -6x + x2) = x * x + (-3)(-3) Multiply x * x 9 + -6x + x2 = x2 + (-3)(-3) Multiply -3 * -3 9 + -6x + x2 = x2 + 9 Reorder the terms: 9 + -6x + x2 = 9 + x2 Add '-9' to each side of the equation. 9 + -6x + -9 + x2 = 9 + -9 + x2 Reorder the terms: 9 + -9 + -6x + x2 = 9 + -9 + x2 Combine like terms: 9 + -9 = 0 0 + -6x + x2 = 9 + -9 + x2 -6x + x2 = 9 + -9 + x2 Combine like terms: 9 + -9 = 0 -6x + x2 = 0 + x2 -6x + x2 = x2 Add '-1x2' to each side of the equation. -6x + x2 + -1x2 = x2 + -1x2 Combine like terms: x2 + -1x2 = 0 -6x + 0 = x2 + -1x2 -6x = x2 + -1x2 Combine like terms: x2 + -1x2 = 0 -6x = 0 Solving -6x = 0 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Divide each side by '-6'. x = 0 Simplifying x = 0
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