Question

F(x)= -x² + 2x - 4 calcule

a) F(1)
b) F(-2)

Answer 1

a) -(1)^2 + 2.1 - 4
-1 + 2 - 4
f(1)= -3
b) -(-2)^2 + (-2).2 - 4
-4 - 4 - 4
f(-2)=12

Answer 2

A) (-1)^2+2.1-4=1+(-2)=1-2=-1

B)-(-2)^2+2.-2-4=-4+(-4)=-4-4=-8