Advertisements
Advertisements
प्रश्न
Use the direct method to evaluate :
`("a"/2-"b"/3)("a"/2+"b"/3)`
बेरीज
Advertisements
उत्तर
Note: (a+b) (a−b) = a2 − b2
`("a"/2-"b"/3)("a"/2+"b"/3)`
`=("a"/2)^2-("b"/3)^2`
`="a"^2/4-"b"^2/9`
shaalaa.com
या प्रश्नात किंवा उत्तरात काही त्रुटी आहे का?
APPEARS IN
संबंधित प्रश्न
Write the following cube in expanded form:
(2x + 1)3
Verify:
x3 + y3 = (x + y) (x2 – xy + y2)
Evaluate the following using identities:
(1.5x2 − 0.3y2) (1.5x2 + 0.3y2)
Simplify the following
`(7.83 + 7.83 - 1.17 xx 1.17)/6.66`
Simplify (2x + p - c)2 - (2x - p + c)2
Find the value of 27x3 + 8y3, if 3x + 2y = 20 and xy = \[\frac{14}{9}\]
Find the following product:
(3x − 4y + 5z) (9x2 +16y2 + 25z2 + 12xy −15zx + 20yz)
If a + b + c = 9 and ab +bc + ca = 26, find the value of a3 + b3+ c3 − 3abc
Evalute : `((2x)/7 - (7y)/4)^2`
If p2 + q2 + r2 = 82 and pq + qr + pr = 18; find p + q + r.
