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ajutatima pls x la putrerea2 +8x+7=0

Răspuns :

x²+8x+7 = 0

a = 1, b = 8, c = 7

Delta = b²-4ac = 64-4*1*7 = 64-28 = 36

x1 = (-b + √delta)/2a = (-8+6)/2*1 = -2/2 = -1

x2 = (-b - √delta)/2a = (-8-6)/2 = -14/2 = -7