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-3(4) + 20
-12+20
8
Si:
a = - 2
b = 5
- 15a² - 15 (- 2)²
----------- = ------------------- =
b - 2ab 5 - 2(-2)(5)
- 15(4) -15(4)
---------- = -------------- = Simplificas Sacas 5ta
5 + 20 25
- 3(4)
-------- =
5
-12
-----
5
Respuesta.
- 12/5