Question

Equation (x-15)(x+3) = (x+4) is quadratic equation or not ?

(a) Yes
(b) No​

Answer 1

Answer:

$(x - 15)(x + 3) = (x + 4) \\ {x}^{2} + 3x - 15x - 45 = x + 4 \\ {x}^{2} - 12x - 45 - x - 4 = 0 \\ {x}^{2} - 13x - 49 = 0 \\ the \: degree \: of \: the \: equation \: is \: 2.$

Hence it is a quadratic equation.

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