Advertisements
Advertisements
Question
Expand : `( 3a + 2/b )( 2a - 3/b )`
Sum
Advertisements
Solution
`( 3a + 2/b )( 2a - 3/b) = (3a)(2a) + ( 2/b )(2a) - (3/b)(3a) - (2/b)(3/b)`
= `6a^2 + ( 4/b - 9/b )a - 6/b^2`
= `6a^2 + (-5/b)a - 6/b^2`
= `6a^2 - [5a]/b - 6/b^2`
shaalaa.com
Expansion of Formula
Is there an error in this question or solution?
APPEARS IN
RELATED QUESTIONS
Expand : ( x + 8 ) ( x + 10 )
Expand : ( x + y - z )2
Expand : ( x - 2y + 2 )2
Expand : ( 5x - 3y - 2 )2
Expand : `( x - 1/x + 5)^2`
In the expansion of (2x2 - 8) (x - 4)2; find the value of coefficient of x2
If x > 0 and `x^2 + 1/[9x^2] = 25/36, "Find" x^3 + 1/[27x^3]`
If 2( x2 + 1 ) = 5x, find :
(i) `x - 1/x`
(ii) `x^3 - 1/x^3`
If 2( x2 + 1 ) = 5x, find :
(i) `x - 1/x`
(ii) `x^3 - 1/x^3`
If 3x - `4/x` = 4; and x ≠ 0 find : 27x3 - `64/x^3`
