Advertisements
Advertisements
प्रश्न
Use identities to evaluate : (998)2
उत्तर
(998)2
(998)2 = (1000 - 2)2
We know that
( a - b )2 = a2 + b2 - 2ab
∴ (1000 - 2)2 = 10002 + 22 - 2 x 1000 x 2
= 1000000 + 4 - 4000
= 9,96,004
APPEARS IN
संबंधित प्रश्न
Expand the following, using suitable identity:
(2x – y + z)2
Write the following cube in expanded form:
(2x + 1)3
Without actually calculating the cubes, find the value of the following:
(–12)3 + (7)3 + (5)3
If the volume of a cuboid is 3x2 − 27, then its possible dimensions are
Use the direct method to evaluate :
(2+a) (2−a)
Evaluate: `(2"a"+1/"2a")(2"a"-1/"2a")`
Expand the following:
(2x - 5) (2x + 5) (2x- 3)
If `"a" - 1/"a" = 10;` find `"a" + 1/"a"`
If `"p" + (1)/"p" = 6`; find : `"p"^4 + (1)/"p"^4`
Simplify:
(3a + 2b - c)(9a2 + 4b2 + c2 - 6ab + 2bc +3ca)
