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a) 3x2-7x+2=0 ∆=49-24=25 x=7+-5/6= x1=12/6=2 x2=2/6=1/3 b)x2-6x+9=0 ∆=36-36=0 x=6+-0/2= x1=x2=6/2=3 C)x2-5x+6=0 ∆=25-24=1 x=5+-1/2= x1=6/2=3 x2=2 d)x2-8x+12=0 ∆=64-48=16 x=8+-5/2= x1=13/2 x2=3/2
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a) 3x2-7x+2=0 ∆=49-24=25 x=7+-5/6= x1=12/6=2 x2=2/6=1/3 b)x2-6x+9=0 ∆=36-36=0 x=6+-0/2= x1=x2=6/2=3 C)x2-5x+6=0 ∆=25-24=1 x=5+-1/2= x1=6/2=3 x2=2 d)x2-8x+12=0 ∆=64-48=16 x=8+-5/2= x1=13/2 x2=3/2