Question

What is the missing polynomial?

? – (20 – 4x – 5x^2) = 20 – 7x^2



Options:

4x-12x^2

4x-2x^2

40-4x-12x^2

40-4x-2x^2

Answer 1

Answer:C

Explanation:

Answer 2

C. 40-4x-12x^2

Explanation:

very simple

? – (20 – 4x – 5x2) = 20 – 7x2, so ? = 20 – 7x2 + (20 – 4x – 5x2)

? = 20 – 7x2 + (20 – 4x – 5x2)=20-7x²+20-4x-5x²=40-12x²-4x