If `c>0` and `4a+c<2b` then `ax^2-bx+c=0` has a root win which one of the following intervals a)(0,2) b)(2,3) c)(3,4) d)(-2,0)

if c gt 0 and 4a + c < 2 b then ax^(2) - bx + c=0 has a root in the interval

Sum of the sqaures of the distances from a point to ( c, 0 ) and ( - c , 0) is 4 c ^ 2 . Its locus is

Sum of the squares of the distances from a point to (c,0) and (-c,0) is 4c^(2) .Its locus is

Two electrons are moving in opposite directions with speeds 0.8c and 0.4c where c is the speed of lights in vacuum. Then the relative speed is about

If the equation a x^2+b x+c=0,a ,b ,c , in R have none-real roots, then c(a-b+c)>0 b. c(a+b+c)>0 c. c(4a-2b+c)>0 d. none of these

If the equation a x^2+b x+c=0,a ,b ,c , in R have none-real roots, then c(a-b+c)>0 b. c(a+b+c)>0 c. c(4a-2b+c)>0 d. none of these

If the equation a x^2+b x+c=0,a ,b ,c , in R have none-real roots, then a. c(a-b+c)>0 b. c(a+b+c)>0 c. c(4a-2b+c)>0 d. none of these

For the circle x^(2)+y^(2)-4x+2y+c=0 radius is 4 then c=

For the circle x^(2)+y^(2)-4x+2y+c=0 radius is 4 then c=