x(2x+1)=55

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Solution for x(2x+1)=55 equation:


Simplifying
x(2x + 1) = 55

Reorder the terms:
x(1 + 2x) = 55
(1 * x + 2x * x) = 55
(1x + 2x2) = 55

Solving
1x + 2x2 = 55

Solving for variable 'x'.

Reorder the terms:
-55 + 1x + 2x2 = 55 + -55

Combine like terms: 55 + -55 = 0
-55 + 1x + 2x2 = 0

Factor a trinomial.
(-11 + -2x)(5 + -1x) = 0

Subproblem 1

Set the factor '(-11 + -2x)' equal to zero and attempt to solve: Simplifying -11 + -2x = 0 Solving -11 + -2x = 0 Move all terms containing x to the left, all other terms to the right. Add '11' to each side of the equation. -11 + 11 + -2x = 0 + 11 Combine like terms: -11 + 11 = 0 0 + -2x = 0 + 11 -2x = 0 + 11 Combine like terms: 0 + 11 = 11 -2x = 11 Divide each side by '-2'. x = -5.5 Simplifying x = -5.5

Subproblem 2

Set the factor '(5 + -1x)' equal to zero and attempt to solve: Simplifying 5 + -1x = 0 Solving 5 + -1x = 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 + -1x = 0 + -5 Combine like terms: 5 + -5 = 0 0 + -1x = 0 + -5 -1x = 0 + -5 Combine like terms: 0 + -5 = -5 -1x = -5 Divide each side by '-1'. x = 5 Simplifying x = 5

Solution

x = {-5.5, 5}

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