if , then what is the value of (2a+3b)?

What is the compound interest on a sum of ₹25,000 after three years at a rate of 12 per cent per annum interest compounded yearly?  

If   then the value of n is : 

If 15x² – 26x + 8 = (Ax + B) (Cx + D), where A and C are positive integers, then what is the value of (2A + B – C – 2D) ?

If (x + 6y) = 8, and xy = 2, where x > O, what is the value of (x³+216y³)?

If x = z = 225 and y = 226 then the value of : x³ + y³ + z³ – 3xyz is

A complete factorization of x⁴+64 is 

If then the value of x