Y=2x-8
2x-2+3y=6
y=2x-8
2x-2+6x-24=6
8x=32
x=4; y=0
sin(arcCos 0)=sin(П/2)=1.................................
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x² + (p² + p - 6)x - p = 0
x₁ + x₂ = - (p² + p - 6)
- (p² + p - 6) = 0
p² + p - 6 = 0
p₁ = - 3 p₂ = 2
Ответ : при p = - 3 и p = 2