Question

What is the missing polynomial ?-(20-4x5x^2)=20-7x^2

Answer 1

Answer:
`-2x^2-4x+40`

Explanation:

Suppose the missing polynomial be f(x)

So, we can write

`\Rightarrow f(x)-(20-4x+5x^2)=20-7x^2\\\Rightarrow f(x)=20-7x^2+(20-4x+5x^2)\\\Rightarrow f(x)=-2x^2-4x+40`