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x² + 5x + 4 = 0
( x + 4 ) ( x + 1 ) = 0
x = -4 atau x = -1
2).
x² - 36 = 0
( x + 6 ) ( x - 6 ) = 0
x = -6 atau x = 6
(x+1)(1+4) nxm = 4 (1 x 4)
x= -1 V x= -4
2. x²-36=0
x² = 36
x =√36 =6
3. x²+1+1=0
x²+2=0
x²= -2
x =√-2