Question

Find the x-coordinates of the points where the graph crosses the x-axis:

29. y=2x² - 3x - 35

31: y=-7x² - 2x + 5

Answer 1

29. (5,0) and (-7/2,0)

30. (-1,0) and (5/7,0)

Explanation:

29. y=2x² - 3x - 35

y = (x-5)(2x+7)

y is 0 at x = 5 and -(7/2)

31: y=-7x² - 2x + 5

y = -(x+1)(7x-5)

y is 0 at -1 and 5/7

See the attached graph.