Question

check whether X + 3 ka whole cube is equal to x cube minus 8 is a quadratic equation

Answer 1

ATQ,
(x+3)^3=x^3-8
or, x^3+3^3+3×3×x(x+3)=x^3-8
or, 9+9^2+27=-8
or, 9+8+27+9^2=0
or, 9x^2+27x+17=0

Thus it comes out to be a quadratic equation.

Hope, it helps

Answer 2

Answer:

Yes, the given equation is a quadratic equation.

Step-by-step explanation:

To find : Check whether $(x+3)^3=x^3-8$ is a quadratic equation ?

Solution :

Quadratic equation is in form, $ax^2+bx+c=0$

We solve the given equation,

$(x+3)^3=x^3-8$

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

$x^3+27+9x^2+9x=x^3-8$

$x^3+27+9x^2+9x-x^3+8=0$

$9x^2+9x+35=0$

Yes, the given equation is a quadratic equation.