P(x)=-.4x^2+80x-1600

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Solution for P(x)=-.4x^2+80x-1600 equation: 


Simplifying
P(x) = -0.4x2 + 80x + -1600

Multiply P * x
xP = -0.4x2 + 80x + -1600

Reorder the terms:
xP = -1600 + 80x + -0.4x2

Solving
xP = -1600 + 80x + -0.4x2

Solving for variable 'x'.

Reorder the terms:
1600 + -80x + xP + 0.4x2 = -1600 + 80x + -0.4x2 + 1600 + -80x + 0.4x2

Reorder the terms:
1600 + -80x + xP + 0.4x2 = -1600 + 1600 + 80x + -80x + -0.4x2 + 0.4x2

Combine like terms: -1600 + 1600 = 0
1600 + -80x + xP + 0.4x2 = 0 + 80x + -80x + -0.4x2 + 0.4x2
1600 + -80x + xP + 0.4x2 = 80x + -80x + -0.4x2 + 0.4x2

Combine like terms: 80x + -80x = 0
1600 + -80x + xP + 0.4x2 = 0 + -0.4x2 + 0.4x2
1600 + -80x + xP + 0.4x2 = -0.4x2 + 0.4x2

Combine like terms: -0.4x2 + 0.4x2 = 0.0
1600 + -80x + xP + 0.4x2 = 0.0

The solution to this equation could not be determined.

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