Asked by Anonymous
Find the roots of x^4 - 16 = 0.
√ x^4 = √ 16
x^2 = 4
√ x^2 = ± √ 4
2,-2
√ x^4 = √ 16
x^2 = 4
√ x^2 = ± √ 4
2,-2
Answers
Answered by
Reiny
correct
or
(x^2+4)(x^2-4) = 0
x^2 + 4 = 0 --> no real solution
or
x^2 - 4 = 0
(x+2)(x-2) = 0
x = ±2
or
(x^2+4)(x^2-4) = 0
x^2 + 4 = 0 --> no real solution
or
x^2 - 4 = 0
(x+2)(x-2) = 0
x = ±2
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