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harleyy6802
25.06.2019 •
Mathematics
Solve the system of equations y=2x-3 y=x^2-2x-8
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Ответ:
Step-by-step explanation:
(a) Set the two functions equal to each other
(b) Factor the quadratic equation
Find two numbers that multiply to give -5 and add to give ₄9.
Possible pairs are 1, -5; -1, 5;
By trial and error, you will find that 1 and -5 work:
1 × (-5) = -5 and 1 - 5= -4
x² - 4x - 8 = (x + 1)(x - 5)
(c) Solve the quadratic
Ответ: