Question

Va rog frumos! Nu ne-a explicat profesorul.

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Answer 1

$a)(x - 1) {}^{2} = 16 = > x - 1 = - 4. \: \: \: x - 1 = 4 = > x = - 3. \: \: \: x = 5$

$b)(x - 3) {}^{2} = 36 = > x - 3 = 6. \: \: \: x - 3 = - 6 = > x = - 3. \: \: x = 9.$

$c)(x + 5) {}^{2} = 49 = > x + 5 = - 7. \: \: x + 5 = 7 = > x = - 12. \: \: \: \: x = 2.$

$d)(x + 2) {}^{2} = 25 = > x + 2 = 5 . \: \: \: x + 2 = - 5 = > \: \: x = 3. \: \: x = - 7.$