150=x(20-x)

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Solution for 150=x(20-x) equation:


Simplifying
150 = x(20 + -1x)
150 = (20 * x + -1x * x)
150 = (20x + -1x2)

Solving
150 = 20x + -1x2

Solving for variable 'x'.

Reorder the terms:
150 + -20x + x2 = 20x + -20x + -1x2 + x2

Combine like terms: 20x + -20x = 0
150 + -20x + x2 = 0 + -1x2 + x2
150 + -20x + x2 = -1x2 + x2

Combine like terms: -1x2 + x2 = 0
150 + -20x + x2 = 0

Begin completing the square.

Move the constant term to the right:

Add '-150' to each side of the equation.
150 + -20x + -150 + x2 = 0 + -150

Reorder the terms:
150 + -150 + -20x + x2 = 0 + -150

Combine like terms: 150 + -150 = 0
0 + -20x + x2 = 0 + -150
-20x + x2 = 0 + -150

Combine like terms: 0 + -150 = -150
-20x + x2 = -150

The x term is -20x.  Take half its coefficient (-10).
Square it (100) and add it to both sides.

Add '100' to each side of the equation.
-20x + 100 + x2 = -150 + 100

Reorder the terms:
100 + -20x + x2 = -150 + 100

Combine like terms: -150 + 100 = -50
100 + -20x + x2 = -50

Factor a perfect square on the left side:
(x + -10)(x + -10) = -50

Can't calculate square root of the right side.

The solution to this equation could not be determined.

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