21X^2-20X+4=

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Solution for 21X^2-20X+4= equation:


Simplifying
21X2 + -20X + 4 = 0

Reorder the terms:
4 + -20X + 21X2 = 0

Solving
4 + -20X + 21X2 = 0

Solving for variable 'X'.

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

Subproblem 1

Set the factor '(2 + -7X)' equal to zero and attempt to solve: Simplifying 2 + -7X = 0 Solving 2 + -7X = 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 + -7X = 0 + -2 Combine like terms: 2 + -2 = 0 0 + -7X = 0 + -2 -7X = 0 + -2 Combine like terms: 0 + -2 = -2 -7X = -2 Divide each side by '-7'. X = 0.2857142857 Simplifying X = 0.2857142857

Subproblem 2

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

Solution

X = {0.2857142857, 0.6666666667}

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