Answer:
Simplifying
x2 + 6x + 13 = 20
Reorder the terms:
13 + 6x + x2 = 20
Solving
13 + 6x + x2 = 20
Solving for variable 'x'.
Reorder the terms:
13 + -20 + 6x + x2 = 20 + -20
Combine like terms: 13 + -20 = -7
-7 + 6x + x2 = 20 + -20
Combine like terms: 20 + -20 = 0
-7 + 6x + x2 = 0
Factor a trinomial.
(-7 + -1x)(1 + -1x) = 0
Subproblem 1
Set the factor '(-7 + -1x)' equal to zero and attempt to solve:
Simplifying
-7 + -1x = 0
Solving
-7 + -1x = 0
Move all terms containing x to the left, all other terms to the right.
Add '7' to each side of the equation.
-7 + 7 + -1x = 0 + 7
Combine like terms: -7 + 7 = 0
0 + -1x = 0 + 7
-1x = 0 + 7
Combine like terms: 0 + 7 = 7
-1x = 7
Divide each side by '-1'.
x = -7
Simplifying
x = -7
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 = {-7, 1}
Step-by-step explanation:
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