Advertisements
Advertisements
प्रश्न
Use the direct method to evaluate :
(3x2+5y2) (3x2−5y2)
बेरीज
Advertisements
उत्तर
Note: (a+b) (a−b) = a2 − b2
(3x2+5y2) (3x2−5y2) = (3x2)2 − (5y2)2
= 9x4 − 25y4
shaalaa.com
या प्रश्नात किंवा उत्तरात काही त्रुटी आहे का?
APPEARS IN
संबंधित प्रश्न
Evaluate the following using identities:
(1.5x2 − 0.3y2) (1.5x2 + 0.3y2)
Find the cube of the following binomials expression :
\[2x + \frac{3}{x}\]
Find the following product:
(x3 + 1) (x6 − x3 + 1)
If a - b = 4 and a + b = 6; find
(i) a2 + b2
(ii) ab
Use the direct method to evaluate :
(3b−1) (3b+1)
Evaluate: (5xy − 7) (7xy + 9)
If `"a"^2 - 7"a" + 1` = 0 and a = ≠ 0, find :
`"a"^2 + (1)/"a"^2`
If a2 - 3a - 1 = 0 and a ≠ 0, find : `"a" - (1)/"a"`
If `"p" + (1)/"p" = 6`; find : `"p"^2 + (1)/"p"^2`
If `"a" + (1)/"a" = 2`, then show that `"a"^2 + (1)/"a"^2 = "a"^3 + (1)/"a"^3 = "a"^4 + (1)/"a"^4`
