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(√x² + 2x -3)² < (4√2)²
x² + 2x - 3 < 16 x 2
x² + 2x - 3 < 32
x² + 2x - 3 - 32 < 0
x² + 2x -35 < 0
(x - 5) (x + 7) < 0
⇒ (x - 5) < 0
x < 5
⇒ (x + 7) < 0
x < -7
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