emily-collins_609682203857a
emily-collins_609682203857a
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a - b = 1 --> b = a-1 a² + b² = 13 a²+(a-1)² = 13 a²+a²-2a+1 = 13 2a²-2a+1-13= 2a²-2a-12=0 :(2) a²-a-6 = 0 ∆ = b²-4ac ∆ = (-1)²-4.1.(-6) ∆ = 1+24 ∆ = 25 a = (-b+/-\/∆)/2a a = (-(-1)+-\/25)/2 a = (1+/-5)/2 a' = (1+5)/2 = 6/2 = 3 a…