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Simplifying 28x2 + 28x + 16 = 0 Reorder the terms: 16 + 28x + 28x2 = 0 Solving 16 + 28x + 28x2 = 0 Solving for variable 'x'. Factor out the Greatest Common Factor (GCF), '4'. 4(4 + 7x + 7x2) = 0 Ignore the factor 4.Subproblem 1
Set the factor '(4 + 7x + 7x2)' equal to zero and attempt to solve: Simplifying 4 + 7x + 7x2 = 0 Solving 4 + 7x + 7x2 = 0 Begin completing the square. Divide all terms by 7 the coefficient of the squared term: Divide each side by '7'. 0.5714285714 + x + x2 = 0 Move the constant term to the right: Add '-0.5714285714' to each side of the equation. 0.5714285714 + x + -0.5714285714 + x2 = 0 + -0.5714285714 Reorder the terms: 0.5714285714 + -0.5714285714 + x + x2 = 0 + -0.5714285714 Combine like terms: 0.5714285714 + -0.5714285714 = 0.0000000000 0.0000000000 + x + x2 = 0 + -0.5714285714 x + x2 = 0 + -0.5714285714 Combine like terms: 0 + -0.5714285714 = -0.5714285714 x + x2 = -0.5714285714 The x term is x. Take half its coefficient (0.5). Square it (0.25) and add it to both sides. Add '0.25' to each side of the equation. + 0.25 + x2 = -0.5714285714 + 0.25 Combine like terms: + 0.25 = 1.25 1.25 + x2 = -0.5714285714 + 0.25 Combine like terms: -0.5714285714 + 0.25 = -0.3214285714 1.25 + x2 = -0.3214285714 Factor a perfect square on the left side: (x + 0.5)(x + 0.5) = -0.3214285714 Can't calculate square root of the right side. The solution to this equation could not be determined. This subproblem is being ignored because a solution could not be determined. The solution to this equation could not be determined.
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