Q7 of 134 Page 4


Check whether the following equation is quadratic or not: (x + 1)(x + 3) =0.

Quadratic equation is an equation with degree 2.

(x + 1)(x + 3) = 0
x 2 + 4x 3 = 0
The degree of the given equation is 2
∴ (x + 1)(x + 3) = 0 is a quadratic equation.

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