determine whether the value of variable of the roots of the quadratic equations or not x²-4x-5=0 x=1,-1​

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1. x²-4x-5=0

   • x=1,-1

   On Putting The value of x=1 we get,

   →1¹+(-4×1)-5=0

   →1-4-5=0

   8≠0

   ∴ x = 1 is not the root of the given quadratic equation.

   On Putting The value of x=-1 we get,

   →(-1)²+(-4×-1)-5=0

   →1+4-5=0

   →5-5=0

   0=0

   ∴ x = -1 is the root of the given quadratic equation.

   Only x=(-1) is the root of the Given Quadratic Equation

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