Advertisements
Advertisements
प्रश्न
If a2 + b2= 10 and ab = 3; find : a – b
योग
Advertisements
उत्तर
(a − b)2 = a2 + b2 − 2ab
⇒ (a − b)2 = 10 − 2×3
⇒ (a − b)2 = 10 − 6
⇒ (a − b)2 = 4
⇒ (a − b) = `sqrt4`
⇒ a − b = ±2
shaalaa.com
Application of Formulae
क्या इस प्रश्न या उत्तर में कोई त्रुटि है?
APPEARS IN
संबंधित प्रश्न
If a2 + b2 = 29 and ab = 10, find : a − b
If `"a" - 1/"a"=4`, find : `"a"^2+1/"a"^2`
If `"a"^2+ 1/"a"^2=11`, find : `"a" -1/"a"`
If a + b + c = 10 and a2 + b2 + c2 = 38, find : ab + bc + ca
Find: a2 + b2 + c2, if a + b + c = 9 and ab + bc + ca = 24
If `2"x"-1/(2"x")=4`, find: `8"x"^3-1/(8"x"^3)`
If `3"x"+1/(3"x")=3`, find : `27"x"^3+1/(27"x"^3)`
If a + b + c = 9 and ab + bc + ca = 15, find: a2 + b2 + c2.
If a + b + c = 11 and a2 + b2 + c2 = 81, find : ab + bc + ca.
If 5x – 4y = 7 and xy = 8, find : 125x3 – 64y3.
