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andrezito [222]
3 years ago
14

Find all real numbers x such that x^4 ≤ 8x^2 − 16.

Mathematics
1 answer:
Maru [420]3 years ago
4 0
x^4 \leq 8x^2 -16\\
x^4-8x^2+16\leq0\\
(x^2-4)^2\leq0\\
x^2-4=0\\
x^2=4\\
x=-2 \vee x=2
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