Advertisements
Advertisements
Question
Use the direct method to evaluate :
`(3/5"a"+1/2)(3/5"a"-1/2)`
Sum
Solution
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
Is there an error in this question or solution?
APPEARS IN
RELATED QUESTIONS
Use suitable identity to find the following product:
(x + 8) (x – 10)
Evaluate the following using identities:
(1.5x2 − 0.3y2) (1.5x2 + 0.3y2)
Evaluate the following using identities:
(0.98)2
Write in the expanded form: `(x + 2y + 4z)^2`
Evaluate of the following:
(103)3
If x = −2 and y = 1, by using an identity find the value of the following
4y2 − 9x2 (16y4 + 36x2y2+81x4)
Evaluate:
483 − 303 − 183
Use identities to evaluate : (998)2
Evaluate : (4a +3b)2 - (4a - 3b)2 + 48ab.
If a + `1/a`= 6 and a ≠ 0 find :
(i) `a - 1/a (ii) a^2 - 1/a^2`
