Advertisements
Advertisements
प्रश्न
Using suitable identities, evaluate the following.
(339)2 – (161)2
Advertisements
उत्तर
We have,
(339)2 – (161)2 = (339 + 161)(339 – 161) ...[Using the identity, a2 – b2 = (a + b)(a – b)]
= 500 × 178
= 89000
APPEARS IN
संबंधित प्रश्न
(5 + 20)(–20 – 5) = ?
The pathway of a square paddy field has 5 m width and length of its side is 40 m. Find the total area of its pathway. (Note: Use suitable identity)
The value of p for 512 – 492 = 100p is 2.
Using suitable identities, evaluate the following.
9.8 × 10.2
Using suitable identities, evaluate the following.
(729)2 – (271)2
Factorise the following using the identity a2 – b2 = (a + b)(a – b).
x2 – 9
Factorise the following using the identity a2 – b2 = (a + b)(a – b).
`x^2/9 - y^2/25`
Factorise the following using the identity a2 – b2 = (a + b)(a – b).
16x4 – 81
Factorise the following using the identity a2 – b2 = (a + b)(a – b).
8a3 – 2a
The radius of a circle is 7ab – 7bc – 14ac. Find the circumference of the circle. `(pi = 22/7)`
