Question

X2-9=0 ?... x2-2x=0 ?...

Answer 1

X2-9=0 x2 = 9 akar 9 = 3

Answer 2

X² - 9 = 0 
x² = 9
x = √9
x = 3

x² - 2x = 0
x² = 2x
x²/x = 2
x = 2

seperti ini maksud soal anda ?

atau seperti ini ?
x² - 9 = 0 
x² = 9
x = √9
x = 3

x² - 9 => x => 3 x 2 - 2x = 0
                => 6 - 2x = 0
                => 2x = 6
                => x = 3