Question

What is the missing polynomial ? ?-(20-4x-5x^2)=20-7x^2

Answer 1

Answer:

$-12x^2-4x+40$

Step-by-step explanation:

We have been given a polynomial $??-(20-4x-5x^2)=20-7x^2$. We are asked to find the missing polynomial.

To find our missing polynomial, we will add $(20-4x-5x^2)$ on both sides of our equation as:

$??-(20-4x-5x^2)+(20-4x-5x^2)=20-7x^2+(20-4x-5x^2)$

Using distributive property, we will get:

$??=20-7x^2+20-4x-5x^2$

Upon combining like terms, we will get:

$??=-7x^2-5x^2-4x+20+20$

$??=-12x^2-4x+40$

Therefore, the missing value of our given polynomial is $-12x^2-4x+40$.

Answer 2

The correct answer is C) 40-4x-12x^2