Question

Check whether following equation is a quadratic equation or not:

(x + 2)3 = (x + 5)(x2 – 1)​

Answer 1

Answer:

yes

it is a quadratic equation.

(x+2)³=(x+5)(x²-1)

x³+8+6x²+18x=x³+5x²-x-5

8+6x²+18x-5x²+x+5=0

x²+19x+13

so,it is a quadratic equation.