Advertisements
Advertisements
प्रश्न
If a2 + b2 = 41 and ab = 4, find : a + b
बेरीज
Advertisements
उत्तर
(a + b)2 = a2 + b2 + 2ab
= 41 + 2(4)
= 41 + 8
= 49
⇒ (a + b)2 = 49
∴ a + b = 7
shaalaa.com
Important Formula of Expansion
या प्रश्नात किंवा उत्तरात काही त्रुटी आहे का?
APPEARS IN
संबंधित प्रश्न
Expand : `(3"x"+1/(3"x"))^2`
Find the square of `3"x"+2/"y"`
Find the square of `2"m"^2-2/3"n"^2`
Find the square of `5"x"+1/(5"x")`
If `"a" +1/"a"=2`, find: `"a"^4+1/"a"^4`
If `"m" -1/"m"=5`, find: `"m"^4+1/"m"^4`
If `"m" -1/"m"=5`, find: `"m"^2-1/"m"^2`
If `2"a"+1/(2"a")=8`, find : `4"a"^2+1/(4"a"^2)`
If `3"x"-1/(3"x")=5`, find : `9"x"^2+1/(9"x"^2)`
Expand : (2a – 5b – 4c)2
