(1.) (x+2)²≥2(x²+7)
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1 Answer

(x+2)2≥2(x2+7),

x2+4x+4≥2x2+14,

0≥x2-4x+10,

x2-4x+10≤0,

(x2-4x+4)-4+10≤0,

(x-2)2≤-6, has no real solutions, because a square cannot be negative.

There are complex solutions (containing imaginary numbers. For example, x=2±i√6).

by Top Rated User (1.2m points)

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