21x^2-x=10

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Solution for 21x^2-x=10 equation:


Simplifying
21x2 + -1x = 10

Reorder the terms:
-1x + 21x2 = 10

Solving
-1x + 21x2 = 10

Solving for variable 'x'.

Reorder the terms:
-10 + -1x + 21x2 = 10 + -10

Combine like terms: 10 + -10 = 0
-10 + -1x + 21x2 = 0

Factor a trinomial.
(-2 + -3x)(5 + -7x) = 0

Subproblem 1

Set the factor '(-2 + -3x)' equal to zero and attempt to solve: Simplifying -2 + -3x = 0 Solving -2 + -3x = 0 Move all terms containing x to the left, all other terms to the right. Add '2' to each side of the equation. -2 + 2 + -3x = 0 + 2 Combine like terms: -2 + 2 = 0 0 + -3x = 0 + 2 -3x = 0 + 2 Combine like terms: 0 + 2 = 2 -3x = 2 Divide each side by '-3'. x = -0.6666666667 Simplifying x = -0.6666666667

Subproblem 2

Set the factor '(5 + -7x)' equal to zero and attempt to solve: Simplifying 5 + -7x = 0 Solving 5 + -7x = 0 Move all terms containing x to the left, all other terms to the right. Add '-5' to each side of the equation. 5 + -5 + -7x = 0 + -5 Combine like terms: 5 + -5 = 0 0 + -7x = 0 + -5 -7x = 0 + -5 Combine like terms: 0 + -5 = -5 -7x = -5 Divide each side by '-7'. x = 0.7142857143 Simplifying x = 0.7142857143

Solution

x = {-0.6666666667, 0.7142857143}

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