shellbyoliver42 shellbyoliver42 09-03-2017 Mathematics contestada find the difference. (9a^4+2a^2+5)-(16a^4-7a^2+1) A. 25a^4-5a^2-4 B. -7a-5a^2+6 C. 25a^8+9a^4+6 D. -7a^4+9a^2+4