Question

1) x²+12x+35=0

2) Дано: x²-5x+m=0

x1=-3

x2-?

m-?
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Answer 1

Răspuns:

x^2+12x+35=0

delta=144-140=4

x1=(-12-2)/2=-14/2=-7

x2=(-12+2)/2=-10/2=-5

Answer 2

Răspuns:

Explicație pas cu pas:

1)

x^2 + 12x + 35 = 0

Δ = 144 - 140 = 4

x1 = (-12 + 2)/2 = -5

x2 = (-12 - 2)/2 = -7

______________

x^2 - 5x + m = 0

x1 = -3

x1 + x2 = 5

x2 = 5 - x1 = 5 + 3 = 8

m = x1*x2 = -3*8 = -24