( x-3) (x+3) = 5x - 9
x²-9=5x-9
x²-5x=0 ...a=1 ,b=-5 e c=0
x*(x-5)=0
x=0
x-5=0 ==>x=5
raízes ( 0,5)
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( x-3) (x+3) = 5x - 9
x²-9=5x-9
x²-5x=0 ...a=1 ,b=-5 e c=0
x*(x-5)=0
x=0
x-5=0 ==>x=5
raízes ( 0,5)