Question

check whether the following are quadratic equations: (x+2)^3=2x^3-4​

Answer 1

Answer:

Not quadratic

Step-by-step explanation:

Given (x + 2)³ = 2x³ - 4

To check: simplify and compare

Solution:- => (x + 2)³ = 2x³ - 4

=> x³ + 8 + 6x(x + 2) = 2x³ - 4

=> x³ + 6x² + 12x + 8 = 2x³ - 4

=> 2x³ - x³ - 6x² - 12x - 4 - 8 = 0

=> x³ - 6x² - 12x - 12 = 0

Since given equation has 3 degree

So given equation is not quadratic