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stephaniepowell
stephaniepowell stephaniepowell
  • 27-08-2016
  • Mathematics
Answered

Simplify (7x + 2 + 8x4) – (2x – 5 – 8x4) + (3x + 5x4)

A15x4 + 14x + 7
B21x4 + 8x + 7
C21x4 + 14x + 7
D15x4 + 19x + 7

Verified Answer :

dalendrk
dalendrk dalendrk
  • 27-08-2016

\((7x+2+8x^4)-(2x-5-8x^4)+(3x+5x^4)\\\\=7x+2+8x^4-2x+5+8x^4+3x+5x^4\\\\=(8+8+5)x^4+(7-2+3)x+(2+5)\\\\=\boxed{21x^4+8x+7}\to\fbox{B.}\)

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