Advertisements
Advertisements
प्रश्न
If a2 + b2 = 41 and ab = 4, find : a + b
योग
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
क्या इस प्रश्न या उत्तर में कोई त्रुटि है?
APPEARS IN
संबंधित प्रश्न
Expand: `("a"+1/(2"a"))^2`
Expand : `(2"a"-1/"a")^2`
Expand : (a+b−c)2
Expand : `(2"x"-1/(2"x"))^2`
Find the square of `"5a"/"6b"-"6b"/"5a"`
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"^2+1/"a"^2`
If `"m" -1/"m"=5`, find: `"m"^4+1/"m"^4`
If `3"x"-1/(3"x")=5`, find : `9"x"^2+1/(9"x"^2)`
