hope564
18.06.2020 •
Mathematics
Solve x^2-8x-9=0 algebrically
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Ответ:
x=9 x=-1
Step-by-step explanation:
x^2-8x-9=0
Factor
What 2 numbers multiply to -9 and add to -8
(x-9) (x+1) =0
Using the zero product property
x-9 =0 x+1 =0
x=9 x=-1
Ответ:
B. 3/8 is your answer