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x² + 3x = 6x + 4
x² - 3x - 4 = 0
(x + 1)(x - 4)
d.
x(x+3)=2(3x+2)
x²+3x=6x+4
x²+3x-6x-4=0
x²-3x-4=0
(x+1)(x-4)=0
jadi akar akarnya
x=-1 atau x=4
d).
1/(x+1) = 1 + x/2
1/(x+1) = 2/2 + x/2
1/(x+1) = (x+2)/2
(x+1)(x+2)=2.1
x²+2x+x+2=2
x²+3x+2-2=0
x²+3x+0=0
(x+3)(x+0)
jadi akar akarnya
x=-3 atau x=0