Advertisements
Advertisements
प्रश्न
If a2 + b2= 10 and ab = 3; find : a + b
बेरीज
Advertisements
उत्तर
(a + b)2 = a2 + b2 + 2ab
⇒ (a + b)2 = 10 + 2×3
⇒ (a + b)2 = 10 + 6
⇒ (a + b)2 = 16
⇒ (a + b) = `sqrt16`
⇒ a + b = ±4
shaalaa.com
Application of Formulae
या प्रश्नात किंवा उत्तरात काही त्रुटी आहे का?
APPEARS IN
संबंधित प्रश्न
If a2 + b2 = 29 and ab = 10, find : a − b
If a2 + b2= 10 and ab = 3; find : a – b
If `"a"^2+ 1/"a"^2=23`, find : `"a" +1/"a"`
Find: a2 + b2 + c2, if a + b + c = 9 and ab + bc + ca = 24
If a + b = 6 and ab = 8, find: a3 + b3.
If a – b = 3 and ab = 10, find : a3 – b3.
If `2"x"-1/(2"x")=4`, find : `4"x"^2+1/(4"x"^2)`
If `2"x"-1/(2"x")=4`, find: `8"x"^3-1/(8"x"^3)`
If a + b + c = 11 and a2 + b2 + c2 = 81, find : ab + bc + ca.
If a + b = 8 and ab = 15, find a3 + b3.
