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amandajbrewerdavis
16.10.2019 •
Mathematics
One of the solutions to x2 − 2x − 15 = 0 is x = −3. what is the other solution?
x = −5
x = −1
x = 1
x = 5
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Ответ:
jk=ac=-15 and j+k=b=-2 so j and k must be -5 and 3 so the factors are:
(x-5)(x+3)
So the other solution is x=5
Ответ:
$4.95 for 3 - $1.65 each
$6.72 for 4 - $1.68 each