Respuesta :

Answer:

f(7)=58

b(-2)-a(12)=-188

Step-by-step explanation:

f(7)=(7)^2+9

49+9

f(7)= 58

b(-2)-a(12)=8(-2)-14-13(12)-2

-16-14-156-2

=-188

Answer:

Step-by-step explanation:

f(7). f(x)=x^2+9

Put x = 7 in the equation

f(7) = 7^2 + 9 =58

Find b(-2)-a(12)

b(-2)=8x-14= -16-14=-30

a(x)=13x-2

a(12) =13×12 -2= 154

b(-2)-a(12) = -30-154

= -124

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