Question

Dadas as funções p (x)=x ao quadrado -5x+6 e q (x)=4+x calcule x,de modo que p (q) (x) =0

Answer 1

p (x)= x² -5x +6
x²-5x+6=0
∆=(-5)²-4.1.6
∆=25-24=1

x'=5+1/2
x'=6/2=3

x"=5-1/2
x"=4/2=2

q (x) = 4+x
x= -4

q (-4) = 4-4=0

p (3) = 3²-5.3+6
9-15+6=0
p (2) = 2²-5.2+6
4-10+6=0