Advertisements
Advertisements
प्रश्न
Using suitable identities, evaluate the following.
9.8 × 10.2
Advertisements
उत्तर
We have,
9.8 × 10.2 = (10 – 0.2)(10 + 0.2)
= 102 – (0.2)2 ...[Using the identity, (a + b)(a – b) = a2 – b2]
= 100 – 0.04
= 99.96
APPEARS IN
संबंधित प्रश्न
Using the identity (a + b)(a – b) = a2 – b2, find the following product
(1 + 3b)(3b – 1)
Simplify (5x – 3y)2 – (5x + 3y)2
The value of p for 512 – 492 = 100p is 2.
Using suitable identities, evaluate the following.
(339)2 – (161)2
Using suitable identities, evaluate the following.
(729)2 – (271)2
Factorise the following using the identity a2 – b2 = (a + b)(a – b).
28ay2 – 175ax2
Factorise the following using the identity a2 – b2 = (a + b)(a – b).
9x2 – 1
Factorise the following using the identity a2 – b2 = (a + b)(a – b).
`(2p^2)/25 - 32q^2`
Factorise the following using the identity a2 – b2 = (a + b)(a – b).
`x^2/25 - 625`
Verify the following:
`((3p)/7 + 7/(6p))^2 - (3/7p + 7/(6p))^2 = 2`
