Advertisements
Advertisements
प्रश्न
Use the direct method to evaluate :
`("z"-2/3)("z"+2/3)`
बेरीज
Advertisements
उत्तर
Note: (a+b) (a−b) = a2 − b2
`("z"-2/3)("z"+2/3)=("z")^2-(2/3)^2`
`="z"^2-4/9`
shaalaa.com
या प्रश्नात किंवा उत्तरात काही त्रुटी आहे का?
APPEARS IN
संबंधित प्रश्न
Use suitable identity to find the following product:
(x + 4) (x + 10)
Simplify the following:
322 x 322 - 2 x 322 x 22 + 22 x 22
Simplify the following expressions:
`(x + y - 2z)^2 - x^2 - y^2 - 3z^2 +4xy`
If \[x^4 + \frac{1}{x^4} = 119\] , find the value of \[x^3 - \frac{1}{x^3}\]
Find the following product:
(3x + 2y + 2z) (9x2 + 4y2 + 4z2 − 6xy − 4yz − 6zx)
If a + b = 7 and ab = 12, find the value of a2 + b2
Evaluate: (1.6x + 0.7y) (1.6x − 0.7y)
If `"a" + 1/"a" = 6;`find `"a" - 1/"a"`
The value of 2492 – 2482 is ______.
Factorise the following:
25x2 + 16y2 + 4z2 – 40xy + 16yz – 20xz
