If `x_1 and x_2` are the roots of `15x^2 + 28x + 12 = 0,` then

21x^(2) - 28x + 10=0

21x^(2) - 28x + 10=0

21x^(2) - 28x + 10=0

21x^(2) - 28x + 10=0

21x^(2) - 28x + 10=0

If p and q are the roots of the equation x^2 - 15x + r = 0 and. p - q = 1 , then what is the value of r?

If -1,2 and alpha are the roots of 2x^3 +x^2-7x-6=0 , then find alpha

If -1,2 and alpha are the roots of 2x^3 +x^2-7x-6=0 , then find alpha

if alpha and beta are the roots of the equation x^(2)+x+1=0 then alpha^(28)+beta^(28)=(A)1(B)-1(C)0(D)2

I: The roots of 4x^(3) + 20x^(2) - 23x + 6 = 0 are 1, 2, -6. II: The roots of 15x^(3) - 23x^(2) + 9x - 1 = 0 are1, 1/3, 1/5 .