2X^2+X=66

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Solution for 2X^2+X=66 equation:


Simplifying
2X2 + X = 66

Reorder the terms:
X + 2X2 = 66

Solving
X + 2X2 = 66

Solving for variable 'X'.

Reorder the terms:
-66 + X + 2X2 = 66 + -66

Combine like terms: 66 + -66 = 0
-66 + X + 2X2 = 0

Factor a trinomial.
(-6 + -1X)(11 + -2X) = 0

Subproblem 1

Set the factor '(-6 + -1X)' equal to zero and attempt to solve: Simplifying -6 + -1X = 0 Solving -6 + -1X = 0 Move all terms containing X to the left, all other terms to the right. Add '6' to each side of the equation. -6 + 6 + -1X = 0 + 6 Combine like terms: -6 + 6 = 0 0 + -1X = 0 + 6 -1X = 0 + 6 Combine like terms: 0 + 6 = 6 -1X = 6 Divide each side by '-1'. X = -6 Simplifying X = -6

Subproblem 2

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

Solution

X = {-6, 5.5}

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