Jika a³- a -1 = 0 maka a⁴ + a³ - a²- 2a-9=
SBMPTN
chrismada
Pertanyaan
Jika a³- a -1 = 0 maka a⁴ + a³ - a²- 2a-9=
1 Jawaban
-
1. Jawaban bapakdr
a⁴ + a³ - a² - 2a - 9
= a⁴ - a² - a - a + a³ - 9
= a⁴ - a² - a + a³ - a - 1 - 8
= a(a³ - a - 1) + (a³ - a - 1) - 8
= a(0) + 0 - 8
= -8