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Simplifying x2 + bx + 15 = 0 Reorder the terms: 15 + bx + x2 = 0 Solving 15 + bx + x2 = 0 Solving for variable 'b'. Move all terms containing b to the left, all other terms to the right. Add '-15' to each side of the equation. 15 + bx + -15 + x2 = 0 + -15 Reorder the terms: 15 + -15 + bx + x2 = 0 + -15 Combine like terms: 15 + -15 = 0 0 + bx + x2 = 0 + -15 bx + x2 = 0 + -15 Combine like terms: 0 + -15 = -15 bx + x2 = -15 Add '-1x2' to each side of the equation. bx + x2 + -1x2 = -15 + -1x2 Combine like terms: x2 + -1x2 = 0 bx + 0 = -15 + -1x2 bx = -15 + -1x2 Divide each side by 'x'. b = -15x-1 + -1x Simplifying b = -15x-1 + -1x
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