Question

Sendo f(x) = x² - 5x + c, encontre o valor de c para, f(3) = -2

Answer 1

$f(x)=x^2-5x+c\\f(3)=3^2-5.3+c$

$3^2-5.3+c=-2$

$9-15+c=-2$

$-6+c=-2$

$c=-2+6$

$c=4$