Rebekah1149 Rebekah1149

04-10-2016
Mathematics

contestada

What type of equation is x^2 - 2x - 15 = 0 ? And how do you solve it? Please be as descriptive as you can! :)

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apologiabiology apologiabiology

04-10-2016

factor
what multipies to -15 and adds to -2?
-5 and 3
(x-5)(x+3)=0
set each to zero

x-5=0
x=5
x+3=0
x=-3

x=-3 or 5

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