Answer:
Step-by-step explanation:
f(-3)=-(-3)²+7(-3)-13
=-9-21-13
=-43
[tex]f(x)=-x^2+7x-13\\ \\ f(-3)=-(-3)^2+7(-3)-13\\ \\ f(-3)=-(9)-21-13\\ \\ f(-3)=-43[/tex]
