jika f(x) = x²-2x -17, nilai f(5) - 3f(2)= ????
Matematika
d996d04
Pertanyaan
jika f(x) = x²-2x -17, nilai f(5) - 3f(2)= ????
2 Jawaban
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1. Jawaban kasalim812
f(x) = xkuadrat - 2x - 17
f ( 5 ) = 25 - 10 - 17 = -2
f ( 2 ) = 4 - 4 - 17 = - 17
3 f ( 2 ) = - 51
-2 - ( - 51 ) = 49 -
2. Jawaban cmiapah9
f(5) - 3f(2) = [[tex] 5^{2} [/tex] - 2(5) - 17] - 3[[tex] 2^{2} [/tex]- 2(2) - 17
= (25 - 10 - 17) - 3 (4 - 4 - 17)
= -2 - 12 + 12 + 51
= 49