Q. What is (f−g)(x)?f(x)=−4xg(x)=−3x2+7xWrite your answer as a polynomial or a rational function in simplest form.______
Identify formula: Identify the formula for (f−g)(x).(f−g)(x) is the difference of f(x) and g(x).(f−g)(x)=f(x)−g(x)
Substitute functions: We have: f(x)=−4xg(x)=−3x2+7xSubstitute the functions into the formula for (f−g)(x).(f−g)(x)=f(x)−g(x)(f−g)(x)=(−4x)−(−3x2+7x)
Distribute negative sign: Distribute the negative sign through the terms in g(x).(f−g)(x)=−4x−(−3x2)−7x(f−g)(x)=−4x+3x2−7x
Combine like terms: Combine like terms. Since there are no like terms with 3x2, it remains as is. Combine the terms −4x and −7x. (f−g)(x)=3x2−4x−7x(f−g)(x)=3x2−11x