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27 December, 08:16

Solve by graphing. x2 2x - 8 = 0

a. - 2, 4

b. 2, - 4

c. 2, - 4

d. - 2, 4

+4
Answers (1)
  1. 27 December, 08:39
    0
    Well, to solve, garph the equation y=x^2+2x-8 and y=0

    see where they intersect

    anyway the easier way is to factor but anyway

    0 = (x-4) (x+2)

    anyway

    solution is x=4 and - 2

    A and D are answers (they are same)
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