Resposta :
f(x)=x² +x²+2x+1
f(x)=145
x² +x²+2x+1=145
2x²+2x-144=0
x²+x-72=0
Delta= 1+288=289
x= -b+(raiz quadrada de 289)/2
x=16/2=8
R= x=8 x+1=9
f(x)=145
x² +x²+2x+1=145
2x²+2x-144=0
x²+x-72=0
Delta= 1+288=289
x= -b+(raiz quadrada de 289)/2
x=16/2=8
R= x=8 x+1=9