Question

(X+2)^3=2x(x^2-1) find whether it is a quadratic equations​

Answer 1

Answer:

We know that the general form of quadratic equation is ax2+bx+c=0.

The given equation is (x+2)3=2x(x2−1) can be simplified as follows: 

(x+2)3=2x(x2−1)⇒x3+23+(3×x×2)(x+2)=2x3−2x(∵(a+b)3=a3+b3+3ab(a+b))⇒x3+8+6x(x+2)=2x3−2x⇒x3+8+6x2+12x=2x3−2x⇒x3+8+6x2+12x−2x3+2x=0⇒−x3+6x2+14x+8=0

Since the variable x in the equation −x3+6x2+14x