fredo99
20.01.2021 •
Mathematics
Factorise x2 - 5x – 24, and hence solve x2 - 5x – 24 = 0.
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Ответ:
Step-by-step explanation:
x² - 5x - 24 = (x - 8)(x + 3).
When x² - 5x - 24 = 0, (x - 8)(x + 3) = 0.
By Zero product rule, x - 8 = 0 or x + 3 = 0.
=> x = 8 or x = -3.
Ответ:
Step-by-step explanation:
Ответ:
-3 + 3 = 0