5x^2-17x+21=3x^2

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Solution for 5x^2-17x+21=3x^2 equation:


Simplifying
5x2 + -17x + 21 = 3x2

Reorder the terms:
21 + -17x + 5x2 = 3x2

Solving
21 + -17x + 5x2 = 3x2

Solving for variable 'x'.

Combine like terms: 5x2 + -3x2 = 2x2
21 + -17x + 2x2 = 3x2 + -3x2

Combine like terms: 3x2 + -3x2 = 0
21 + -17x + 2x2 = 0

Factor a trinomial.
(3 + -2x)(7 + -1x) = 0

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 '(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 = {1.5, 7}

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