2x^2+5x+3.125=21.125

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Solution for 2x^2+5x+3.125=21.125 equation:


Simplifying
2x2 + 5x + 3.125 = 21.125

Reorder the terms:
3.125 + 5x + 2x2 = 21.125

Solving
3.125 + 5x + 2x2 = 21.125

Solving for variable 'x'.

Reorder the terms:
3.125 + -21.125 + 5x + 2x2 = 21.125 + -21.125

Combine like terms: 3.125 + -21.125 = -18
-18 + 5x + 2x2 = 21.125 + -21.125

Combine like terms: 21.125 + -21.125 = 0.000
-18 + 5x + 2x2 = 0.000

Factor a trinomial.
(-9 + -2x)(2 + -1x) = 0.000

Subproblem 1

Set the factor '(-9 + -2x)' equal to zero and attempt to solve: Simplifying -9 + -2x = 0 Solving -9 + -2x = 0 Move all terms containing x to the left, all other terms to the right. Add '9' to each side of the equation. -9 + 9 + -2x = 0 + 9 Combine like terms: -9 + 9 = 0 0 + -2x = 0 + 9 -2x = 0 + 9 Combine like terms: 0 + 9 = 9 -2x = 9 Divide each side by '-2'. x = -4.5 Simplifying x = -4.5

Subproblem 2

Set the factor '(2 + -1x)' equal to zero and attempt to solve: Simplifying 2 + -1x = 0 Solving 2 + -1x = 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 + -1x = 0 + -2 Combine like terms: 2 + -2 = 0 0 + -1x = 0 + -2 -1x = 0 + -2 Combine like terms: 0 + -2 = -2 -1x = -2 Divide each side by '-1'. x = 2 Simplifying x = 2

Solution

x = {-4.5, 2}

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