Evaluate :
`( 2a + 3b + 5 ) ( 2a - 3b + 5 )`

Evaluate : (7)/(2a+3b)-(5)/(2a-3b)

(2a ^ (2) + 3b ^ (2)) (5a ^ (2) -6b ^ (2))

If a : b = 4 : 5, then (2a + 3b) : (3a + 2b) is equal to : यदि a : b = 4 : 5 है, तो (2a + 3b) : (3a + 2b) का मान क्या होगा ?

Find the value of : (a) | 3/5 - 2/3 | ( b ) | -5/7 + 1 |

If a = 2 and b = 3, find the value of (i) a + b (ii) a^(2) + ab (iii) ab - a^(2) (iv) 2a - 3b (v) 5a^(2) - 2ab (vi) a^(3) - b^(3)

Find the value of n if a= 2^3 x 3, b = 2 x 3 x 5, c = 3^n x 5 and LCM (a, b, c) = 2^3 x 3^2 x 5.

Subtract b (b ^(2) + b- 7) + 5 from 3b ^(2) - 8 and find the value of expression obtained for b = – 3.