1.

Solve : (x-1)^2 = (4√x-4)^2 = ?

Answer»
{x}^{2}  - 2x + 1 = 16x - 64 \\  {x}^{2}  - 18x + 65  = 0 \\  {x}^{2}  - 13x - 5x + 65 = 0 \\ x(x - 13) - 5(x - 13) = 0 \\ (x - 5)(x - 13) = 0 \\  x = 5 \: or \: x = 13


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