Question

Simplify (3a

4 – 2a

2

+ 5a – 10) – (2a

4

+ 4a

2

+ 5a – 2).

A. a

4

+ 4a

2

+ 10a – 12

B. a

4

+ 2a

2

+ 10a – 12

C. 5a

4

+ 4a

3

+ 3a

2

+ 10a – 12

D. a

4 – 6a

2 – 8

Answer 1

Explanation:

(3a^4 – 2a^2 + 5a – 10) – (2a^4 + 4a^2 + 5a – 2)

= 3a^4 – 2a^2 + 5a – 10 – 2a^4 - 4a^2 - 5a + 2

= a^4 - 6a^2 - 8

Answer 2

(3a^4 – 2a^2 + 5a – 10) – (2a^4 + 4a^2 + 5a – 2)
= 3a^4 – 2a^2 + 5a – 10 – 2a^4 - 4a^2 - 5a + 2
= a^4 - 6a^2 - 8