" (i) "5x+9=5+8x

Add : 5x , 8x

What should be added to 7x+5-8x^(2) , so that the sum is 15x+9x-5 ?

If 3 (5x-7) -4 (8x-13) =2 (9x-11)-17 , then the value of (7x-5)/(11x-9) is

If f(x) = 9x^(2) + 5x - 8 , then f(-2) = ?

For what value of x in R the following expressions are negative i) x^(2) - 5x - 6 ii) -7x^(2) + 8x - 9

The perimeter of a tringle is 15x^(2) - 23x + 9 and two of its sides are 5x^(2) - 8x -1 and 6x^(2) -9x + 4 . Find the side.

Obtain the differential of the following : (i) (x-1) (2x+5) (ii) (9x^(3)-8x+7)(3x^(2)+5)