Advertisements
Advertisements
प्रश्न
Use the direct method to evaluate :
`(3/5"a"+1/2)(3/5"a"-1/2)`
बेरीज
Advertisements
उत्तर
Note: (a+b) (a−b) = a2 − b2
`(3/5"a"+1/2)(3/5"a"-1/2)`
`=(3/5 "a")^2-(1/2)^2`
`=9/25"a"^2-1/4`
shaalaa.com
या प्रश्नात किंवा उत्तरात काही त्रुटी आहे का?
APPEARS IN
संबंधित प्रश्न
Evaluate the following product without multiplying directly:
95 × 96
Expand the following, using suitable identity:
(3a – 7b – c)2
Find the cube of the following binomials expression :
\[\frac{1}{x} + \frac{y}{3}\]
If \[x^4 + \frac{1}{x^4} = 623\] then \[x + \frac{1}{x} =\]
If a + b + c = 9 and ab + bc + ca =23, then a3 + b3 + c3 − 3abc =
Evaluate: (2a + 0.5) (7a − 0.3)
Evaluate: `(2"x"-3/5)(2"x"+3/5)`
Expand the following:
(m + 8) (m - 7)
If `"a" + (1)/"a" = 2`, then show that `"a"^2 + (1)/"a"^2 = "a"^3 + (1)/"a"^3 = "a"^4 + (1)/"a"^4`
Using suitable identity, evaluate the following:
9992
