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(x-10) (x-6)
X-10=0 ^ x-6=0
X=10 ^ x=6
2da
X2-12x+45=0
(x-15) (x+3)
X-15=0 ^ x+3=0
X=15 ^ x=-3
x -10=0
x + 6=0
x+6=0
x= -6
x -10=0
x=10
x2-12×- 45=0
x -15=0
x +3=0
x= -3
x=15