`2x^2 + 7x - 15 = 0`

(i) 7x^(2) + 16x - 15 = 0 (ii) 5y^(2)+ 8y - 21 = 0

If the roots of 2x^(2) + 7x + 5 = 0 are the reciprocal roots of ax^(2) + bx + c = 0 , then a-c = "_____" .

Divide 4x^(2) + 7x - 15 " by " x +3

The number of solutions of the equation log _((x + 1)) ( 2x ^(2) + 7x + 5) + log _( ( 2x + 5)) (x +1) ^( 2) -4 =0, x gt 0, is ______.

The discriminant of the equation x^(2) - 7x + 2 = 0 is

I. 3x^(2) - 7x+2 = 0" " II. 2y^(2) - 11y + 15 = 0

30x^(2)+7x-15

I. x^(2) - 6x = 7" " II. 2y^(2) + 13y + 15 = 0