Given f, left bracket, x, right bracket, equals, 4, x, plus, 5f(x)=4x+5, find f, left bracket, minus, 3, right bracketf(−3).
To find f(-3), we substitute -3 into the expression for f(x):
f(x) = 4x + 5
Therefore,
f(-3) = 4(-3) + 5
= -12 + 5
= -7
So, f(-3) = -7.