What is the product of (x + a) and (x + b)?

If x + y + 3 = 0 , then find the value of x³+y³-9xy+9.

If   $$x+{1\over x}=2 $$ then the value of    $$x^{12}-{1\over x^{12}} $$ is

When a number x is divided by a divisor it is seen that the divisor = 4 times the quotient=double the remainder. If the remainder is 80 then the value of x is

If (10 a³+4b³):(11a³-15b³)=7:5, then (3a+5b):(9a-2b)=?

If (x + y)³ +8 (x - y)³ = (3x+ Ay)(3x²+ Bxy+ Cy²), then the value of A+B+C is:

Given that x³ + y³ = 72 and xy = 6 with x > y. Then the value of (x – y) is

Directions: In each of these questions, two equations (i) and (ii) are given, you have to solve both the equations and give answer accordingly.

(i) 2x² + 9x + 9 = 0
 (ii) 15y² + 16y + 4 = 0