Question

Which polynomial represents the sum below?

(3x² + 3) + (3x²+x+4)


A. 9x²+x+7

B. 9x²+x+12

C. 6x²+x+12

D. 6x²+x+7

Answer 1

D

Explanation:

(3x² + 3) + (3x² + x + 4 ) ← remove parenthesis

= 3x² + 3 + 3x² + x + 4 ← collect like terms

= 6x² + x + 7

Answer 2

Choice D

Explanation:

(3x² + 3) + (3x²+x+4)

Removing brackets,

• 3x²+3+3x²+x+4

Bringing like (equal) terms and numbers together,

• 3x²+3x²+3+4+x

Simplifying,

• 6x²+7+x

This could be the rewritten as

• 6x²+x+7

Choice D