Question

(x+1)²-x=7

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Answer 1

Resposta:

(x+1)2-x= 7 é x1 = -3, x2 = 2

Answer 2

Resposta:

(x+1)²-x=7

x²+2x+1-x-7=0

x²+x-6=0

∆=b²-4ac

∆= 1²-4*1*(-6)

∆= 1+24

∆= 25

x½= -b±√∆/2a

x½= -1±√25/2*1

x½=-1±5/2

x1= -1+5/2= 4/2=2

x2= -1-5/2= -6/2= -3

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