2x^2+2x+1=841

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Solution for 2x^2+2x+1=841 equation:


Simplifying
2x2 + 2x + 1 = 841

Reorder the terms:
1 + 2x + 2x2 = 841

Solving
1 + 2x + 2x2 = 841

Solving for variable 'x'.

Reorder the terms:
1 + -841 + 2x + 2x2 = 841 + -841

Combine like terms: 1 + -841 = -840
-840 + 2x + 2x2 = 841 + -841

Combine like terms: 841 + -841 = 0
-840 + 2x + 2x2 = 0

Factor out the Greatest Common Factor (GCF), '2'.
2(-420 + x + x2) = 0

Factor a trinomial.
2((-21 + -1x)(20 + -1x)) = 0

Ignore the factor 2.

Subproblem 1

Set the factor '(-21 + -1x)' equal to zero and attempt to solve: Simplifying -21 + -1x = 0 Solving -21 + -1x = 0 Move all terms containing x to the left, all other terms to the right. Add '21' to each side of the equation. -21 + 21 + -1x = 0 + 21 Combine like terms: -21 + 21 = 0 0 + -1x = 0 + 21 -1x = 0 + 21 Combine like terms: 0 + 21 = 21 -1x = 21 Divide each side by '-1'. x = -21 Simplifying x = -21

Subproblem 2

Set the factor '(20 + -1x)' equal to zero and attempt to solve: Simplifying 20 + -1x = 0 Solving 20 + -1x = 0 Move all terms containing x to the left, all other terms to the right. Add '-20' to each side of the equation. 20 + -20 + -1x = 0 + -20 Combine like terms: 20 + -20 = 0 0 + -1x = 0 + -20 -1x = 0 + -20 Combine like terms: 0 + -20 = -20 -1x = -20 Divide each side by '-1'. x = 20 Simplifying x = 20

Solution

x = {-21, 20}

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