1. 3x² - 7x + 4 = 0 2. 2x² - (x - 3)² = -2 2. 6x² + 7x - 5 = 0
Matematika
sherlymarsela
Pertanyaan
1. 3x² - 7x + 4 = 0
2. 2x² - (x - 3)² = -2
2. 6x² + 7x - 5 = 0
2. 2x² - (x - 3)² = -2
2. 6x² + 7x - 5 = 0
1 Jawaban
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1. Jawaban luthfilh
1. 3x^2 - 7x + 4=0
x^2 - 7x + 12=0
(x-4) (x-3)
x+4/3 x+3/3=1
2. 2x^2 - (x-3)^2 = -2
2x^2 - (x^2 - 6x +9) = -2
2x^2 - x^2 + 6x -9 +2 = 0
x^2 + 6x -7=0
(x+7) (X-1)
x= -7 x= 1
3.6x^2 + 7x - 5 =0
x^2 + 7x - 30 = 0
(x+10) (X-3)
x= - 10/6 x= 3/6