caencisorios18 caencisorios18

11-05-2021
Mathematics

contestada

Solve the following system of equations algebraically:
Y = x^2 + 8x – 9
Y = 2x + 7

Respuesta :

cromano2 cromano2

11-05-2021

use simultaneous equations:
2x + 7 = x^2 + 8x - 9
7 = x^2 + 6x - 9
16 = x^2 + 6x
+ or - 4 = 7x
answer is
-4/7 or 4/7

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