(3x²y)³-5y⁷ = 27x^6•y^3-5y^7
-5x²<span>-x+4=0
D=1+80=81
x</span>₁=(1-9)/(-10)=0,8
x₂=(1+9)(/(-10)=-1
-5x²-x+4=-5(x-0,8)(x+1)
2^(-x+6)=2^4x.
-x+6=4x.
5x=6.
x=6/5=1,2.
3^(-x-4)=3^3x.
-x-4=3x.
4x=-4.
x=-4/4=-1.
2) п/10= 180/10 = 18
8п/15= 8*180/15= 96
5п/12= 5*180/12=75