Exercise

If the equation $9x^2+6kx+4=0$ has equal roots, then $k$ equals

The roots of the equation $a{x}^2+bx+c=0$ are non-real if:

A quadratic equation can have at the most _____ roots.

If the roots of $5x^2+13x+k=0$ are reciprocal of each other, then

If the equation $4x^2-3kx+1=0$ has equal roots, then $k$ equals:

The equation $x^2-3x+7=0$ has _____ roots. $($real$/$non-real$)$

The perimeter of a rectangle is $104 \mathrm{m}$ and its area is $640 {\mathrm{m}}^2$. Find its length and breadth.

The roots of the quadratic equation $x^2+2pq=\left(p+2q\right)x$ are: