Question

1) 4x²-7x-2=0 2) 3x²+2x+1=0 3) 5(2x-1)-3(3x+6)<2 4) 5x+10/x-1*x²-1/x²-4 5) y+c/c*(c/y-c/y+c)

Answer 1

1)d=7 в квадрате+32=81

х(1)=2, x(2)=-0,25.