Make the given changes in the indicated examples of this section and then solve the resulting quadratic equations.

In Example 3(a), change the − sign before 7x to + and then solve.

Data from Exercises 3(a)

The quadratic equation 3x² − 7x + 2 = 0 has roots x = 1/3 and x = 2. This is seen by substituting these numbers in the equation.

3(-) 7) + 2 = 3() 3+2 = 3(2) 7(2) + 2 = 3(4) - 14 + 2 = 14 - 14 = 0 7+2= = 0