Advertisements
Advertisements
प्रश्न
Using the identity (x + a)(x + b) = x2 + x(a + b) + ab, find the following product
(8 + pq)(pq + 7)
योग
Advertisements
उत्तर
(8 + pq)(pq + 7)
Substituting x = pq, a = 8 and b = 7
In (x + a)(x + b) = x2 + x(a + b) + ab, we get
(pq + 8)(pq + 7) = (pq)2 + pq(8 + 7) + (8)(7)
= p2q2 + pq(15) + 56
(8 + pq)(pq + 7) = p2q2 + 15pq + 56
shaalaa.com
क्या इस प्रश्न या उत्तर में कोई त्रुटि है?
अध्याय 3: Algebra - Exercise 3.1 [पृष्ठ ६१]
APPEARS IN
संबंधित प्रश्न
Expand.
(a + 2) (a − 1)
Expand.
(13 + x) (13 − x)
Expand.
(3x + 4y) (3x + 5y)
Expand.
(9x − 5t) (9x + 3t)
Expand.
`(m + 2/3)(m − 7/3)`
Expand: (2a + 3b)(2a - 3b).
(x + a)(x + b) = x2 + (a + b)x + ______.
Using suitable identities, evaluate the following.
104 × 97
Using suitable identities, evaluate the following.
101 × 103
Using suitable identities, evaluate the following.
98 × 103
