For what real values of x the expressions `x^2-2x+3` is negative?

For what values of x, the expression 6x^(2)+2x^(-3) is negative ?

For real values of x the expression x^(2)-x+1hline

If alpha and beta be the roots of the equation 5x^2+bx+c=0 Show that 5x^2+bx+c=5(x-alpha)(x-beta) Show also that for all real values of x the expression 5x^2+bx+c cannot be negative if alpha and beta are real and equal

For what values of x, the following expressions are negative ? 2x^(2)+5x-3

Find the limits of real value of x so that the expressions 5x^2+6x-8 is non-negative.

For what values of x, the following expressions are negative ? 15+4x-3x^(2)

For what values of x, the following expressions are negative ? x^(2)-7x+10

For what values of x, the following expressions are negative ? x^(2)-5x-6

For what real values of a, will the expression x^(2)-ax+1-2a^(2) , for the real x, be always positive ?