(y-3)(y-7)=12

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Solution for (y-3)(y-7)=12 equation:


Simplifying
(y + -3)(y + -7) = 12

Reorder the terms:
(-3 + y)(y + -7) = 12

Reorder the terms:
(-3 + y)(-7 + y) = 12

Multiply (-3 + y) * (-7 + y)
(-3(-7 + y) + y(-7 + y)) = 12
((-7 * -3 + y * -3) + y(-7 + y)) = 12
((21 + -3y) + y(-7 + y)) = 12
(21 + -3y + (-7 * y + y * y)) = 12
(21 + -3y + (-7y + y2)) = 12

Combine like terms: -3y + -7y = -10y
(21 + -10y + y2) = 12

Solving
21 + -10y + y2 = 12

Solving for variable 'y'.

Reorder the terms:
21 + -12 + -10y + y2 = 12 + -12

Combine like terms: 21 + -12 = 9
9 + -10y + y2 = 12 + -12

Combine like terms: 12 + -12 = 0
9 + -10y + y2 = 0

Factor a trinomial.
(1 + -1y)(9 + -1y) = 0

Subproblem 1

Set the factor '(1 + -1y)' equal to zero and attempt to solve: Simplifying 1 + -1y = 0 Solving 1 + -1y = 0 Move all terms containing y to the left, all other terms to the right. Add '-1' to each side of the equation. 1 + -1 + -1y = 0 + -1 Combine like terms: 1 + -1 = 0 0 + -1y = 0 + -1 -1y = 0 + -1 Combine like terms: 0 + -1 = -1 -1y = -1 Divide each side by '-1'. y = 1 Simplifying y = 1

Subproblem 2

Set the factor '(9 + -1y)' equal to zero and attempt to solve: Simplifying 9 + -1y = 0 Solving 9 + -1y = 0 Move all terms containing y to the left, all other terms to the right. Add '-9' to each side of the equation. 9 + -9 + -1y = 0 + -9 Combine like terms: 9 + -9 = 0 0 + -1y = 0 + -9 -1y = 0 + -9 Combine like terms: 0 + -9 = -9 -1y = -9 Divide each side by '-1'. y = 9 Simplifying y = 9

Solution

y = {1, 9}

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