x2 - 6x = 16
∴ x2 - 6x + 9 = 25
∴ (x - 3)2 = 25
∴ x - 3 = 25
∴ x = 28
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-10 = 6x - 16, or 16 - 10 = 6x, or x = 1.
8x + 16 = 6x -> 2x + 16 = 0 -> 2x = -16 -> x = -8
x2 + 6x = 7 ⇒ x2 + 6x + 9 = 7 + 9 ⇒ (x + 3)2 = 16 ⇒ x + 3 = ±4 ⇒ x = -7 or 1
√(6x) - 3 - 3√x = 1 √(6x) -3√x = 4 √x = 4/(√6 - 3) = -4(√6 + 3)/3 = 16/9*(15+6√6) = 16/3*(5+2√6) = 52.8, approx.
-22