(4-y)(4-y)+y^2=16

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Solution for (4-y)(4-y)+y^2=16 equation:


Simplifying
(4 + -1y)(4 + -1y) + y2 = 16

Multiply (4 + -1y) * (4 + -1y)
(4(4 + -1y) + -1y * (4 + -1y)) + y2 = 16
((4 * 4 + -1y * 4) + -1y * (4 + -1y)) + y2 = 16
((16 + -4y) + -1y * (4 + -1y)) + y2 = 16
(16 + -4y + (4 * -1y + -1y * -1y)) + y2 = 16
(16 + -4y + (-4y + 1y2)) + y2 = 16

Combine like terms: -4y + -4y = -8y
(16 + -8y + 1y2) + y2 = 16

Combine like terms: 1y2 + y2 = 2y2
16 + -8y + 2y2 = 16

Add '-16' to each side of the equation.
16 + -8y + -16 + 2y2 = 16 + -16

Reorder the terms:
16 + -16 + -8y + 2y2 = 16 + -16

Combine like terms: 16 + -16 = 0
0 + -8y + 2y2 = 16 + -16
-8y + 2y2 = 16 + -16

Combine like terms: 16 + -16 = 0
-8y + 2y2 = 0

Solving
-8y + 2y2 = 0

Solving for variable 'y'.

Factor out the Greatest Common Factor (GCF), '2y'.
2y(-4 + y) = 0

Ignore the factor 2.

Subproblem 1

Set the factor 'y' equal to zero and attempt to solve: Simplifying y = 0 Solving y = 0 Move all terms containing y to the left, all other terms to the right. Simplifying y = 0

Subproblem 2

Set the factor '(-4 + y)' equal to zero and attempt to solve: Simplifying -4 + y = 0 Solving -4 + y = 0 Move all terms containing y to the left, all other terms to the right. Add '4' to each side of the equation. -4 + 4 + y = 0 + 4 Combine like terms: -4 + 4 = 0 0 + y = 0 + 4 y = 0 + 4 Combine like terms: 0 + 4 = 4 y = 4 Simplifying y = 4

Solution

y = {0, 4}

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