y=.5(x-.4)(x-1)

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Solution for y=.5(x-.4)(x-1) equation: 


Simplifying
y = 0.5(x + -0.4)(x + -1)

Reorder the terms:
y = 0.5(-0.4 + x)(x + -1)

Reorder the terms:
y = 0.5(-0.4 + x)(-1 + x)

Multiply (-0.4 + x) * (-1 + x)
y = 0.5(-0.4(-1 + x) + x(-1 + x))
y = 0.5((-1 * -0.4 + x * -0.4) + x(-1 + x))
y = 0.5((0.4 + -0.4x) + x(-1 + x))
y = 0.5(0.4 + -0.4x + (-1 * x + x * x))
y = 0.5(0.4 + -0.4x + (-1x + x2))

Combine like terms: -0.4x + -1x = -1.4x
y = 0.5(0.4 + -1.4x + x2)
y = (0.4 * 0.5 + -1.4x * 0.5 + x2 * 0.5)
y = (0.2 + -0.7x + 0.5x2)

Solving
y = 0.2 + -0.7x + 0.5x2

Solving for variable 'y'.

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

Simplifying
y = 0.2 + -0.7x + 0.5x2

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