SOLVING Equation 2(x^2 - 4x)^2 - 5(x^2 - 4x) = 3

[@24x7MathTutor]

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[@pas6295]

Let x^2-4×x=a. Then the equation becomes 2a^2-5×a-3=0.
Solving you get a=1/2ora=1. By substuting back you get x-3or-7/4.

[@24x7MathTutor]

a = -1/2 or a = 3