Question

Sendo f (x)=x2-7 x+c , encontre o valor de c para f (1)=4

Answer 1

f(x) = x² - 7x + c

f(1) = 4

x = 1

f(x) = x² - 7.x + c
f(1) = 1² - 7.1 + c
4 = 1 - 7 + c
4 = - 6 + c
4 + 6 = c
10 = c
c = 10

Answer 2

f (x)=x^2-7x+c
1^2-7 . 1 +c=4
-6+c=4
c=4+6
c=10