Advertisements
Advertisements
Question
Evalute : `((2x)/7 - (7y)/4)^2`
Sum
Advertisements
Solution
`((2x)/7 - (7y)/4)^2`
We know that
( a - b )2 = a2 - 2ab + b2
∴ `((2x)/7 - (7y)/4)^2 = ((2x)/7)^2 + ((7y)/4)^2 - 2 xx (2x)/7 xx (7y)/4`
= `(4x^2)/(49) + (49y^2)/16 - xy`
shaalaa.com
Is there an error in this question or solution?
APPEARS IN
RELATED QUESTIONS
Evaluate the following product without multiplying directly:
95 × 96
Expand the following, using suitable identity:
(2x – y + z)2
Evaluate the following using identities:
`(2x+ 1/x)^2`
Simplify: `(a + b + c)^2 - (a - b + c)^2`
Find the cube of the following binomials expression :
\[4 - \frac{1}{3x}\]
Evaluate of the following:
1113 − 893
If \[x + \frac{1}{x} = 2\], then \[x^3 + \frac{1}{x^3} =\]
(a − b)3 + (b − c)3 + (c − a)3 =
Evaluate: `(3"x"+1/2)(2"x"+1/3)`
If `"a"^2 - 7"a" + 1` = 0 and a = ≠ 0, find :
`"a" + (1)/"a"`
