Advertisements
Advertisements
प्रश्न
If m - n = -2 and m3 - n3 = -26, find mn.
योग
Advertisements
उत्तर
m - n = -2, m3 - n3 = -26
(m - n)3 = m3 - n3 - 3mn (m - n)
⇒ (-2)3 = -26 - 3mn (-2)
⇒ 6mn
= - 8 + 26
= 18
⇒ mn = 3.
shaalaa.com
क्या इस प्रश्न या उत्तर में कोई त्रुटि है?
APPEARS IN
संबंधित प्रश्न
Expand.
(101)3
Find the cube of : 3a- 2b
If 4x2 + y2 = a and xy = b, find the value of 2x + y.
Expand : (3x + 5y + 2z) (3x - 5y + 2z)
If 2x - 3y = 10 and xy = 16; find the value of 8x3 - 27y3.
If `("a" + 1/"a")^2 = 3`; then show that `"a"^3 + (1)/"a"^3 = 0`
If a + b + c = 0; then show that a3 + b3 + c3 = 3abc.
Expand: `[x + 1/y]^3`
If `"a" + 1/"a"` = 6, then find the value of `"a"^3 + 1/"a"^3`
Expand (2a + 5)3
