Question

Если 3x^2-5x+k=0 и 6x1 + x2 = 0 найти к

Answer 1

x1+x2=5/3 >> x1-6x1=5/3 >> x1=-1/3    
x1*x2=k/3 >>  2*(-1/3)=k/3 >> k=-2
x2=-6x1 >> x2=2