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Simplifying (7y + 5)(7y + -5) = cy2 + d Reorder the terms: (5 + 7y)(7y + -5) = cy2 + d Reorder the terms: (5 + 7y)(-5 + 7y) = cy2 + d Multiply (5 + 7y) * (-5 + 7y) (5(-5 + 7y) + 7y * (-5 + 7y)) = cy2 + d ((-5 * 5 + 7y * 5) + 7y * (-5 + 7y)) = cy2 + d ((-25 + 35y) + 7y * (-5 + 7y)) = cy2 + d (-25 + 35y + (-5 * 7y + 7y * 7y)) = cy2 + d (-25 + 35y + (-35y + 49y2)) = cy2 + d Combine like terms: 35y + -35y = 0 (-25 + 0 + 49y2) = cy2 + d (-25 + 49y2) = cy2 + d Solving -25 + 49y2 = cy2 + d Solving for variable 'y'. Move all terms containing y to the left, all other terms to the right. Add '-1cy2' to each side of the equation. -25 + -1cy2 + 49y2 = cy2 + -1cy2 + d Combine like terms: cy2 + -1cy2 = 0 -25 + -1cy2 + 49y2 = 0 + d -25 + -1cy2 + 49y2 = d Add '25' to each side of the equation. -25 + -1cy2 + 25 + 49y2 = 25 + d Reorder the terms: -25 + 25 + -1cy2 + 49y2 = 25 + d Combine like terms: -25 + 25 = 0 0 + -1cy2 + 49y2 = 25 + d -1cy2 + 49y2 = 25 + d Reorder the terms: -25 + -1cy2 + -1d + 49y2 = 25 + d + -25 + -1d Reorder the terms: -25 + -1cy2 + -1d + 49y2 = 25 + -25 + d + -1d Combine like terms: 25 + -25 = 0 -25 + -1cy2 + -1d + 49y2 = 0 + d + -1d -25 + -1cy2 + -1d + 49y2 = d + -1d Combine like terms: d + -1d = 0 -25 + -1cy2 + -1d + 49y2 = 0 The solution to this equation could not be determined.
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