ICSE Class 9 Answered
(2X+3y+5)(2x+3y-5)
Asked by shantanupandey271208 | 21 Apr, 2024, 15:03: PM
Expert Answer
Let (2x+3y) = α ;
( 2x + 3y + 5 ) ( 2x +3y - 5 ) = ( α + 5 ) ( α -5) = ( α2 - 25 ) ........................(1)
α2 = ( 2x + 3 y )2 = 4 x2 + 12 x y + 9 y2
Then eqn.(1) becomes
( 2x + 3y + 5 ) ( 2x +3y - 5 ) = ( 4 x2 + 12 x y + 9 y2 - 25 )
Answered by Thiyagarajan K | 21 Apr, 2024, 18:29: PM
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