Advertisements
Advertisements
प्रश्न
Evaluate: `(4/7"a"+3/4"b")(4/7"a"-3/4"b")`
बेरीज
Advertisements
उत्तर
`(4/7"a"+3/4"b")(4/7"a"-3/4"b")`
`=(4/7"a")^2-(3/4"b")^2` ......[ ∵ (a − b) (a + b) = a2b2]
`=16/49"a"^2-9/16"b"^2`
shaalaa.com
या प्रश्नात किंवा उत्तरात काही त्रुटी आहे का?
APPEARS IN
संबंधित प्रश्न
Factorise the following:
27 – 125a3 – 135a + 225a2
What are the possible expressions for the dimensions of the cuboids whose volume is given below?
| Volume : 3x2 – 12x |
Simplify the following product:
(x2 + x − 2)(x2 − x + 2)
If \[x - \frac{1}{x} = - 1\] find the value of \[x^2 + \frac{1}{x^2}\]
If a2 - 5a - 1 = 0 and a ≠ 0 ; find:
- `a - 1/a`
- `a + 1/a`
- `a^2 - 1/a^2`
If x + y = 1 and xy = -12; find:
x2 - y2.
If 2x + 3y = 10 and xy = 5; find the value of 4x2 + 9y2
Using suitable identity, evaluate the following:
1033
Factorise the following:
9y2 – 66yz + 121z2
Without actually calculating the cubes, find the value of:
`(1/2)^3 + (1/3)^3 - (5/6)^3`
