Practise the method.Example 1Simplify 6(x+3)−4x. What is the coefficient of x?Show worked answerAnswer: 2Expand to 6x+18−4x.The x coefficient is 6−4=2.Example 2For every x,(x+2)(x+6)=x2+px+12. Find p.Show worked answerAnswer: 8Expanding gives x2+(2+6)x+12p=8.Example 3Simplify 5(x+6)−2x. What is the coefficient of x?Show worked answerAnswer: 3Expand to 5x+30−2x.The x coefficient is 5−2=3.