21-09-2016
Mathematics

contestada

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

Respuesta :

nobillionaireNobley nobillionaireNobley

22-09-2016

(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

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