Jawabanmu

2014-01-09T19:49:14+07:00
1. x1=-6 x2= 5
2.x1= 7/2 x2= 4
3.x =1/3
4.x1=2 x2=1
5.x1= 1

caranya gimana ? tolong dong
1. x² + x = 30
=(x+6)(x-5)
x1=-6 x2=5
2. 2x² - 15x + 28 = 0
(2x-7)(x-4)
x1=7/2 x2= 4
3. 9x² - 6x + 1 = 0
(3x-1)(3x-1)
x1=1/3
4. x(2x - 3) = -1
2x^2-3x+1
(x-2)(x-1)
x1=2 x2=1
5. (x-1)² = x-1
x^2+1=x-1
x^2-x=0
(x-1)(x+0)
x=1
thanks you yah :)
iya sama"