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Home > AC > Chapter 9 > Lesson 9.2.2 > Problem 9-44

9-44.

To find the x-intercepts, make y = 0.

Method 1:

Draw a generic rectangle and diamond.

Set y = 0.

0 = 5x² + 7x − 6

The missing numbers in the square should equal 7x.

0 = (x + 2)(5x − 3)

x + 2 = 0 or 5x − 3 = 0

x = −2

Method 2:

Substitute the a, b, and c values of the expression into the quadratic formula.

Finish the rest yourself and show that both methods give the same answer.