Question

Check whether the equation (x - 1)(x - 3) = (x + 5)(x - 1) is quadratic or not.​

Answer 1

Step-by-step explanation:

,( x-1)(x-3) is equal to (x+5)(x-1)

this is not an quadratic equation

Answer 2

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$(x - 1)(x + 1) = (x + 5)(x + 1) \\ = > {x}^{2} - 1 = x(x + 1) + 5(x + 1) \\ = > {x}^{2} - 1 = {x}^{2} + x + 5x + 5 \\ = > {x}^{2} - {x}^{2} = 6x + 5 + 1 \\ = > 6x + 6$

this is not a quadratic equation

because it's degree is 1

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