By quadratic equation x2 + x - 420 ,we get, x= 20 and x=-2. here does it have two solution or one solution ?

  The given quadratic equation is,    x2 + x - 420 = 0x2 + 21x - 20x - 420 = 0xx + 21 - 20x + 21 = 0x - 20x + 21 = 0x - 20 = 0    or   x + 21 = 0x = 20     or    x = -21So, 20 and -21 are the solutions of the given quadratic equation.Since, Quadratic equation involves a quadratic polynomial of degree 2, so, it hasonly 2 solutions.

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