Question

5)Vale 2,0pontos 3 X 3 +2 X 2 –X +4 - 5 X 3 +X 2 -5+ 2X 2 -8 X -1

Answer 1

Olá Manu!!!!!

=3⋅3+4−x+4−15+x2−5+4−8x−1=  

=9+4−x+4−15+x2−5+4−8x−1=

=(−x+13)+4−15+x2−5+4−8x−1=

=(−x+17)−15+x2−5+4−8x−1=

=(x²−x+2)−5+4−8x−1=

=(x²−x−3)+4−8x−1=

=(x²−x+1)−8x−1=

=(x²−9x+1)−1=

=x²−9x

Espero ter te ajudado!!!!!!