<span>Ctg (3x+pi/4)= -1
3x + </span>π/4 = - π/4 + πk, k∈Z
3x = -π/2 + πk, k∈z
x = -π/6 + (πk)/3, k ∈z
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С-б-7+2с=3с-б-7
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3а-10-9а+4=(3а-9а)+(-10+4)=-6а-6
X^2+px+g=0
x1+x2=- p
x1*x2=g
-3+8= - 5
-3*8= - 24
x^2 -5x- 24=0
g= -24