Kerjakan soal di bawah ini dng cara memfaktorkan.
1. X² - 2x - 35 = 0
2. 2x² - 2x - 12 = 0
3. X² + 2x - 35 = 0
4. 9x² - 36 = 0
5. 3x² - 5 + 2 = 0
1. X² - 2x - 35 = 0
2. 2x² - 2x - 12 = 0
3. X² + 2x - 35 = 0
4. 9x² - 36 = 0
5. 3x² - 5 + 2 = 0
Penjelasan dengan langkah-langkah:
5. 3x²-5+2=0
= 3x² - 3 = 0
= a= 3 b= 0 c=-3
....+.....= 0
.....×....= 9
(3x-3) (3x+3)=0
= 1/3 3( x-1) (3x+3) = 0
= (x-1) (3x+3)=0
x-1=0
x = 1
3x+3 = 0
3x = -3
x = -3/3
= -1
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