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Mathematics
Darryl Mcdaniel
1 October, 03:53
X^4+13^2+42=0
solve for x
+1
Answers (
1
)
Mercedes Mckinney
1 October, 06:49
0
x = - 28
Step-by-step explanation:
x4 + 13x2 + 42 = 0
Reorder the terms:
42 + 13x2 + x4 = 0
Solving
42 + 13x2 + x4 = 0
Solving for variable 'x'.
Factor a trinomial.
(7 + x2) (6 + x2) = 0
Simplifying
7 + x2 = 0
Solving
7 + x2 = 0
Add '-7' to each side of the equation.
7 + - 7 + x2 = 0 + - 7
Combine like terms: 7 + - 7 = 0
0 + x2 = 0 + - 7
x2 = 0 + - 7
Combine like terms: 0 + - 7 = - 7
x2 = - 7
Simplifying
x2 = - 7 = - 28
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