Question

equação do 2 grau x2-x-156 = 0

Answer 1

x2-x-156=0

∆=b2-4×a×c
∆=(-1)-4×1×(-156)
∆= 1-(624)
∆= 625

x=-b±√∆/2a
x=-(-1)±√625/2×1
x=1±25/2

x'= 26/2=13
x"= -24/2= -12
S=[-12,13]

Answer 2

x²-x-156=0

a=1 b= -1 c= -156

Δ= b²-4.a.c

Δ=(-1) ² -4. (1). (-156)

Δ= 1 + 624

Δ=625

x= -b +- √Δ 2.a

x= 1+- 25 x'= 1+25÷2= 26÷2=13

x''=1-25÷2= -12

S= {-12,13}

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