Jawabanmu

2014-04-06T13:44:33+07:00
X^2+(3-x)^2=9
x^2+9-6x+x^2=9
2x^2-6x=0
a+b= -(-6)/2=3
x^2 nya dari mana?
(3-x)^2= (3-x)(3-x) = 3.3+3.-x+-x.3+x^2=9+-3x-3x+x^2=9-6x+x^2