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-b ± √b²-4ac
x=-----------------
2a
5x²+14x+18
a=5
b=14
c=18
-(14) ± √(14)²-4(5)(18) -(14) ± √196-360 -14 ± √-104
x = ----------------------------- = ----------------------- = --------------- =
2 ( 5 ) 10 10
-14 + √ 104i -14 - √ 104i
---------------- y ----------------
10 10
2) trinomio de la forma x²+bx+c
x²+7x+6
(x+7)(x+1)
x+7= 0 x+1=0
x= -7 x= -1
3) factor comun xP
x(x+12) = 0
x = 0 y x + 12 = 0
x = 0 x = -12
entonces x = 0 y x = -12