Advertisements
Advertisements
प्रश्न
Expand : (3x + 5y + 2z) (3x - 5y + 2z)
बेरीज
Advertisements
उत्तर
(3x + 5y + 2z) (3x - 5y + 2z)
= {(3x + 2z) + (5y)} {(3x + 2z) - (5y)}
= (3x + 2z)2 - (5y)2
{since (a + b) (a - b) = a2 - b2}
= 9x2 + 4z2 + 2 × 3x × 2z - 25y2
= 9x2 + 4z2 + 12xz - 25y2
= 9x2 + 4z2 - 25y2 + 12xz
shaalaa.com
या प्रश्नात किंवा उत्तरात काही त्रुटी आहे का?
APPEARS IN
संबंधित प्रश्न
Find the cube of : `2a + 1/(2a)` ( a ≠ 0 )
If a + 2b + c = 0; then show that: a3 + 8b3 + c3 = 6abc.
Two positive numbers x and y are such that x > y. If the difference of these numbers is 5 and their product is 24, find:
- Sum of these numbers
- Difference of their cubes
- Sum of their cubes.
If a ≠ 0 and `a - 1/a` = 4 ; find : `( a^3 - 1/a^3 )`
Find the cube of: `3"a" + (1)/(3"a")`
Simplify:
(a + b)3 + (a - b)3
Simplify:
`("a" + 1/"a")^3 - ("a" - 1/"a")^3`
Expand: (41)3
Find 27a3 + 64b3, if 3a + 4b = 10 and ab = 2
(p + q)(p2 – pq + q2) is equal to _____________
