Question

check whether the following is a quadratic equation
(x+2)whole cube =2x(x square-1(​

Answer 1

Answer:

(x+2)^3=2x (x^2-1)

x^3+8+6x (x+2)=2x^3-2x

not a quadratic equation

because x3

Answer 2

Therefore it is not a quadratic equation

Step-by-step explanation:

Quadratic equation: The maximum power of the variable is 2.

Example:

$ax^2+bx+c=0$

Where a,b and c are constant.

The variable is x.

Given equation is,

$(x+2)^3= 2x(x^2-1)$

$\Rightarrow x^3+3.x^2.2+3.x.2^2+2^3=2x^3-2x$

$\Rightarrow x^3+6x^2+12x+8=2x^3-2x$

$\Rightarrow 2x^3 -2x -x^3-6x^2-12x-8=0$

$\Rightarrow x^3-6x^2-14x-8=0$

Therefore it is not a quadratic equation. [Because the maximum power of x  is 3]