If #A=4x^2-3x+8# and #B=-2x^2-4x+7#, what is #A-B#?

Question

↳Redirected from "What are valence electrons?"

1558 views around the world

You can reuse this answer
Creative Commons License

Answer 1 · 2016-11-01T21:03:39

#A-B# is #6x^2+x+1#

#A=4x^2−3x+8#
#B=-2x^2-4x+7#

Substitute for A and B into A-B

#(4x^2−3x+8)-(-2x^2-4x+7)#

#=4x^2-3x+8+2x^2+4x-7#

#=4x^2+2x^2-3x+4x+8-7#

#=6x^2+x+1##