kak minta tolong, bantu jawab. saya mohon, tapi di jawab yang serius ya. jangan asal-asalan make kata2 freak. terima kasih
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Verified answer
1. 49
2. maksimum. nilai maksimumnya 1
Penjelasan dengan langkah-langkah:
1. f(x) = -3x² - 5x + 2
a = -3 , b = -5, c = 2
D = b² - 4ac
= (-5)² - 4 x (-3) x 2
= 25 + 24
= 49
2. f(x) = -2x² - 12x - 17
a = -2, b = -12, c = -17
karena a negatif maka nemiliki nilai maksimum
- sumbu simetri
x = -b/2a + -(-12)/2.(-2) = 12/(-4) = -3
- nilai minimum
f(-3) = -2(-3)² - 12.(-3) - 17
= -18 + 36 - 17
= 1
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