is f(x)=x(x+5) a linear function?
Let us expand that\(\sf f(x)=x(x+5)\)\(\sf f(x)=x^2+5x\)Since it has \(\sf x^2\) in it, it is now a linear function.So the answer is \(\sf \boxed{No, ~this~ is~ not~ a ~linear ~function.}\)
f(x)= x(x+5)= x²+5xthis is not a linear function as it is not in the form y=mx+b it is a quadratic function with x intercepts at 0 and -5 and y intercept 5