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

Question

asked Jan 5, 2020 63.0k views

2 Answers

Loryn · Answer 1 · 2020-01-11T17:33:21+0000

Answer:

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