Seudónimo
Seudónimo
24-04-2017
Mathematics
contestada
Help with 2 questions please.
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Tarball
Tarball
24-04-2017
the first one is C or -6,4
Answer Link
Аноним
Аноним
24-04-2017
x^2 - 2x - 24 = 0
(x - 6)(x + 4) = 0
x - 6 = 0 x = 6
x + 4 = x = -4
answer x = 6, -4 (last choice)
----------------------
(x+9)^2 = 169
x^2 + 18x + 81 - 169 = 0
x^2 + 18x -88 =0
(x-4)(x+22) = 0
x - 4 = 0 x = 4
x + 22 = 0 x = -22
answer:
4m (last choice)
Answer Link
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