1
x²-5x-24=0
x1+x2=5 U x1*x2=-24⇒x1=-3 U x2=8
x²-6x-27=0
x1+x2=6 U x1*x2=-27⇒x1=-3 U x2=9
(x²-5x-24)/(x²-6x-27)=(x+3)(x-8)/(x+3)(x-9)=(x-8)/(x-9)
2
(a²-6)/(a²-2√6a+6)=(a-√6)(a+√6)/(a-√6)²=(a+√6)/(a-√6)
Cosx+cos(x+2π)=√2
cosx+cos(2π+x)=√2
cosx+cosx=√2
cosx=√2/2
x₁=π/4+2πn x₂=-π/4+2πn.
1.a) p(3+2c)
b) 7(ab-2)
c) x^4(x-1)
d)3a²c²(a+2c-3ac)
2. a) ax+ay+ab-ax
b)ab+ac+xb+xc
c)kx-ky+cy-cx
d)y+a+ba+y
Решение способом сложения