100=(10-X)(10-X)

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Solution for 100=(10-X)(10-X) equation:


Simplifying
100 = (10 + -1X)(10 + -1X)

Multiply (10 + -1X) * (10 + -1X)
100 = (10(10 + -1X) + -1X * (10 + -1X))
100 = ((10 * 10 + -1X * 10) + -1X * (10 + -1X))
100 = ((100 + -10X) + -1X * (10 + -1X))
100 = (100 + -10X + (10 * -1X + -1X * -1X))
100 = (100 + -10X + (-10X + 1X2))

Combine like terms: -10X + -10X = -20X
100 = (100 + -20X + 1X2)

Add '-100' to each side of the equation.
100 + -100 = 100 + -20X + -100 + 1X2

Combine like terms: 100 + -100 = 0
0 = 100 + -20X + -100 + 1X2

Reorder the terms:
0 = 100 + -100 + -20X + 1X2

Combine like terms: 100 + -100 = 0
0 = 0 + -20X + 1X2
0 = -20X + 1X2

Solving
0 = -20X + 1X2

Solving for variable 'X'.
Remove the zero:
20X + -1X2 = -20X + 1X2 + 20X + -1X2

Reorder the terms:
20X + -1X2 = -20X + 20X + 1X2 + -1X2

Combine like terms: -20X + 20X = 0
20X + -1X2 = 0 + 1X2 + -1X2
20X + -1X2 = 1X2 + -1X2

Combine like terms: 1X2 + -1X2 = 0
20X + -1X2 = 0

Factor out the Greatest Common Factor (GCF), 'X'.
X(20 + -1X) = 0

Subproblem 1

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

Subproblem 2

Set the factor '(20 + -1X)' equal to zero and attempt to solve: Simplifying 20 + -1X = 0 Solving 20 + -1X = 0 Move all terms containing X to the left, all other terms to the right. Add '-20' to each side of the equation. 20 + -20 + -1X = 0 + -20 Combine like terms: 20 + -20 = 0 0 + -1X = 0 + -20 -1X = 0 + -20 Combine like terms: 0 + -20 = -20 -1X = -20 Divide each side by '-1'. X = 20 Simplifying X = 20

Solution

X = {0, 20}

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