Question

Se m e n sao raizes da equaçao X2-9x+18=0, entao (m+7).(n+7) :

Answer 1

Resposta:

x²-9x+18=0

x= (9+-V81-4*18)/2

x=(9+-V81-72)/2

x=(9+-V9/2

x=(9+-3)/2

x'= (9+3)/2

x'= 12/2

x'= 6 = m    *******************

x''=(9-3)/2

x''= 6/2

x''=3=  n    *****************

(m+7)(n+7) = (6+7)(3+7)=13*10= 130  então >>

(m+7)(n+7)= 130

Answer 2

Resposta:

x^2-9x +18=0

Δ=81-72

Δ=9

x=9+ou-√9/2

x'=9+3/2

x'=12/2=6

x"=9-3/2

x"=6/2=3

(m+7).(n+7)

(6+7).(3+7)

13.10=130

Explicação passo-a-passo: