10+9x+x^2=20

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Solution for 10+9x+x^2=20 equation:


Simplifying
10 + 9x + x2 = 20

Solving
10 + 9x + x2 = 20

Solving for variable 'x'.

Reorder the terms:
10 + -20 + 9x + x2 = 20 + -20

Combine like terms: 10 + -20 = -10
-10 + 9x + x2 = 20 + -20

Combine like terms: 20 + -20 = 0
-10 + 9x + x2 = 0

Factor a trinomial.
(-10 + -1x)(1 + -1x) = 0

Subproblem 1

Set the factor '(-10 + -1x)' equal to zero and attempt to solve: Simplifying -10 + -1x = 0 Solving -10 + -1x = 0 Move all terms containing x to the left, all other terms to the right. Add '10' to each side of the equation. -10 + 10 + -1x = 0 + 10 Combine like terms: -10 + 10 = 0 0 + -1x = 0 + 10 -1x = 0 + 10 Combine like terms: 0 + 10 = 10 -1x = 10 Divide each side by '-1'. x = -10 Simplifying x = -10

Subproblem 2

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

Solution

x = {-10, 1}

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