y=(-0.4x+8)(-0.4x+8)+15

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Solution for y=(-0.4x+8)(-0.4x+8)+15 equation: 


Simplifying
y = (-0.4x + 8)(-0.4x + 8) + 15

Reorder the terms:
y = (8 + -0.4x)(-0.4x + 8) + 15

Reorder the terms:
y = (8 + -0.4x)(8 + -0.4x) + 15

Multiply (8 + -0.4x) * (8 + -0.4x)
y = (8(8 + -0.4x) + -0.4x * (8 + -0.4x)) + 15
y = ((8 * 8 + -0.4x * 8) + -0.4x * (8 + -0.4x)) + 15
y = ((64 + -3.2x) + -0.4x * (8 + -0.4x)) + 15
y = (64 + -3.2x + (8 * -0.4x + -0.4x * -0.4x)) + 15
y = (64 + -3.2x + (-3.2x + 0.16x2)) + 15

Combine like terms: -3.2x + -3.2x = -6.4x
y = (64 + -6.4x + 0.16x2) + 15

Reorder the terms:
y = 64 + 15 + -6.4x + 0.16x2

Combine like terms: 64 + 15 = 79
y = 79 + -6.4x + 0.16x2

Solving
y = 79 + -6.4x + 0.16x2

Solving for variable 'y'.

Move all terms containing y to the left, all other terms to the right.

Simplifying
y = 79 + -6.4x + 0.16x2

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