Question

se f(x)=-7x+12, ache f(o)

Answer 1

f(x) = - 7x + 12
f(0) = - 7 * 0 + 12
= 0 + 12
= 12

Answer 2

basta substituirmos o x pelo 0

f(0) = -7.0+12
f(0) = 0 + 12
f(0) = 12