bantu nomor 3 sama 4 nya ajaa dong kakk
Penjelasan dengan langkah-langkah:
no.3
2x (3 - x) - (x - 3)x = 6
6x - 2x² - x² + 3x - 6 = 0
-3x² + 9x - 6 = 0
x² - 3x + 2 = 0
(x - 1)(x - 2) = 0
x - 1 = 0
x = 1
atau
x - 2 = 0
x = 2
HP = { 1, 2 }
jawabannya : d
no. 4
3n (n + 2) = n (n - 4)
3n² + 6n = n² - 4n
3n² - n² + 6n + 4n = 0
2n² + 10n = 0
n² + 5n = 0
n(n + 5) = 0
n = 0
atau
n + 5 = 0
n = -5
hasil kali akar²nya
= -5 x 0
= 0
jawabannya : c
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