Question

The value of f(x)=5x-4x²43 whenx=
-1, is:​

Answer 1

Answer:

f(x)=5x-4x²+43. {if X=-1}

f(x)=5×(-1)-4(-1)²+43

f(x)=--5-4+43

f(x)=-9+43

f(x)=34

f(x)=5x-4x²-43. {if X=-1}

f(x)=5×(-1)-4(-1)²-43

f(x=-5-4-43

f(x)=-9-43=-52