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Simplifying x2 + bx + 7 = 0 Reorder the terms: 7 + bx + x2 = 0 Solving 7 + bx + x2 = 0 Solving for variable 'b'. Move all terms containing b to the left, all other terms to the right. Add '-7' to each side of the equation. 7 + bx + -7 + x2 = 0 + -7 Reorder the terms: 7 + -7 + bx + x2 = 0 + -7 Combine like terms: 7 + -7 = 0 0 + bx + x2 = 0 + -7 bx + x2 = 0 + -7 Combine like terms: 0 + -7 = -7 bx + x2 = -7 Add '-1x2' to each side of the equation. bx + x2 + -1x2 = -7 + -1x2 Combine like terms: x2 + -1x2 = 0 bx + 0 = -7 + -1x2 bx = -7 + -1x2 Divide each side by 'x'. b = -7x-1 + -1x Simplifying b = -7x-1 + -1x
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