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Simplify (7x + 2 + 8x 4 ) – (2x – 5 – 8x 4 ) + (3x + 5x 4 ) A. 15x 4 + 14x + 7 B. 21x 4 + 8x + 7 C. 21x 4 + 14x + 7 D. 15x 4 + 19x + 7

Simplify (7x + 2 + 8x 4 ) – (2x – 5 – 8x 4 ) + (3x + 5x 4 ) A. 15x 4 + 14x + 7 B. 21x 4 + 8x + 7 C. 21x 4 + 14x + 7 D. 15x 4 + 19x + 7
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1 vote
Simplify (7x + 2 + 8x

4

) – (2x – 5 – 8x

4

) + (3x + 5x

4

)

A. 15x

4

+ 14x + 7

B. 21x

4

+ 8x + 7

C. 21x

4

+ 14x + 7

D. 15x

4

+ 19x + 7

User Shreedhar Kotekar
by
8.3k points

1 Answer

3 votes
(7x + 2 + 8x^4) – (2x – 5 – 8x^4) + (3x + 5x^4)
= 7x + 2 + 8x^4 – 2x + 5 + 8x^4 + 3x + 5x^4
= 8x + 7 + 21x^4
= 21x^4 + 8x + 7
User Xiaochen
by
9.8k points
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