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Simplifying 4x2 + 12 = 7x Reorder the terms: 12 + 4x2 = 7x Solving 12 + 4x2 = 7x Solving for variable 'x'. Reorder the terms: 12 + -7x + 4x2 = 7x + -7x Combine like terms: 7x + -7x = 0 12 + -7x + 4x2 = 0 Begin completing the square. Divide all terms by 4 the coefficient of the squared term: Divide each side by '4'. 3 + -1.75x + x2 = 0 Move the constant term to the right: Add '-3' to each side of the equation. 3 + -1.75x + -3 + x2 = 0 + -3 Reorder the terms: 3 + -3 + -1.75x + x2 = 0 + -3 Combine like terms: 3 + -3 = 0 0 + -1.75x + x2 = 0 + -3 -1.75x + x2 = 0 + -3 Combine like terms: 0 + -3 = -3 -1.75x + x2 = -3 The x term is -1.75x. Take half its coefficient (-0.875). Square it (0.765625) and add it to both sides. Add '0.765625' to each side of the equation. -1.75x + 0.765625 + x2 = -3 + 0.765625 Reorder the terms: 0.765625 + -1.75x + x2 = -3 + 0.765625 Combine like terms: -3 + 0.765625 = -2.234375 0.765625 + -1.75x + x2 = -2.234375 Factor a perfect square on the left side: (x + -0.875)(x + -0.875) = -2.234375 Can't calculate square root of the right side. The solution to this equation could not be determined.
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