james-morris_60a2f2152eccd
james-morris_60a2f2152eccd
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x . (x+3) -40=0 x² + 3x - 40 =0 delta= (3)²-4.1.(-40) delta = 9+160 delta = 169 - ( 3)+/-V169/2.1 -3+13/2 = 5 -3-13/2 = -8