X*X-8*X+7=0

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Solution for X*X-8*X+7=0 equation:


Simplifying
X * X + -8X + 7 = 0

Multiply X * X
X2 + -8X + 7 = 0

Reorder the terms:
7 + -8X + X2 = 0

Solving
7 + -8X + X2 = 0

Solving for variable 'X'.

Factor a trinomial.
(1 + -1X)(7 + -1X) = 0

Subproblem 1

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

Subproblem 2

Set the factor '(7 + -1X)' equal to zero and attempt to solve: Simplifying 7 + -1X = 0 Solving 7 + -1X = 0 Move all terms containing X to the left, all other terms to the right. Add '-7' to each side of the equation. 7 + -7 + -1X = 0 + -7 Combine like terms: 7 + -7 = 0 0 + -1X = 0 + -7 -1X = 0 + -7 Combine like terms: 0 + -7 = -7 -1X = -7 Divide each side by '-1'. X = 7 Simplifying X = 7

Solution

X = {1, 7}

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