Chapter 3 - Exponents, Polynomials and Functions - 3.2 Combining Functions - 3.2 Exercises - Page 247: 73

Error: $f(x)+g(x)=0$ CORRECT ANSWER $f(x)+g(x)=10x-2$

$f(x)+g(x)$ is not equal to zero as the student has put in the solution. The student solved the equation $f(x)+g(x)=0$, which was not required. Only the sum of the functions should have been determined. Correction $f(x)+g(x)=3x-10+7x+8$ $f(x)+g(x)=3x+7x-10+8$ $f(x)+g(x)=10x-2$