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2014-06-26T09:55:58+08:00

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9x^{2} -4=0 

(3x-2)(3x+2)=0

3x-2 =0      ;    3x+2=0

x=2/3  ;   x=-2/3

Check:      9x² -4 = 0                           9x² -4 = 0   
            9(2/3)² -4 = 0                      9(-2/3)² -4 = 0 
              9(4/9) -4 = 0                        9(4/9) -4 = 0
                    4 -4 = 0                              4 -4 = 0
                        0 = 0                                  0 = 0


0
meron pa po pla...ung sa checking po jan ung 9(4/9)-4 paano naging 4-4 unnn
kasi 9 times 4/9 equals 4
paano po nangyari un
Parang 9/1 times 4/9 yan. Then multiply numerator to numerator, denominator to denominator. Kaya magiging 36/9. 36 divided by 9 equals 4. Kaya 4
ahh ok