Pfaith8617
27.08.2019 •
Mathematics
Idon' need sleep i need answers
x2+10x= -9
x2-14x+40=-5
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Ответ:
x = -1, -9.
x = 5, 9.
Step-by-step explanation:
x^2 + 10x = -9
x^2 + 10x + 9 = 0
(x + 1)(x + 9) = 0
x = -1, -9.
x^2 - 14x + 40 = -5
x^2 - 14x + 45 = 0
(x - 5)(x - 9) = 0
x = 5, 9.
Ответ:
answer:
money duhstep-by-step explanation:
money is money