81-90x+25x^2=x^2

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Solution for 81-90x+25x^2=x^2 equation:


Simplifying
81 + -90x + 25x2 = x2

Solving
81 + -90x + 25x2 = x2

Solving for variable 'x'.

Combine like terms: 25x2 + -1x2 = 24x2
81 + -90x + 24x2 = x2 + -1x2

Combine like terms: x2 + -1x2 = 0
81 + -90x + 24x2 = 0

Factor out the Greatest Common Factor (GCF), '3'.
3(27 + -30x + 8x2) = 0

Factor a trinomial.
3((3 + -2x)(9 + -4x)) = 0

Ignore the factor 3.

Subproblem 1

Set the factor '(3 + -2x)' equal to zero and attempt to solve: Simplifying 3 + -2x = 0 Solving 3 + -2x = 0 Move all terms containing x to the left, all other terms to the right. Add '-3' to each side of the equation. 3 + -3 + -2x = 0 + -3 Combine like terms: 3 + -3 = 0 0 + -2x = 0 + -3 -2x = 0 + -3 Combine like terms: 0 + -3 = -3 -2x = -3 Divide each side by '-2'. x = 1.5 Simplifying x = 1.5

Subproblem 2

Set the factor '(9 + -4x)' equal to zero and attempt to solve: Simplifying 9 + -4x = 0 Solving 9 + -4x = 0 Move all terms containing x to the left, all other terms to the right. Add '-9' to each side of the equation. 9 + -9 + -4x = 0 + -9 Combine like terms: 9 + -9 = 0 0 + -4x = 0 + -9 -4x = 0 + -9 Combine like terms: 0 + -9 = -9 -4x = -9 Divide each side by '-4'. x = 2.25 Simplifying x = 2.25

Solution

x = {1.5, 2.25}

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