Advertisements
Advertisements
प्रश्न
Using suitable identities, evaluate the following.
47 × 53
मूल्यांकन
Advertisements
उत्तर
We have,
47 × 53 = (50 – 3)(50 + 3)
= (50)2 – (3)2 ...[Using the identity, (a – b)(a + b) = a2 – b2]
= 2500 – 9
= 2491
shaalaa.com
क्या इस प्रश्न या उत्तर में कोई त्रुटि है?
अध्याय 7: Algebraic Expression, Identities and Factorisation - Exercise [पृष्ठ २३३]
APPEARS IN
संबंधित प्रश्न
Find the value of x, if 5x = (50)2 − (40)2.
Find the following product: (x − 11) (x + 4)
Find the following product: (y2 + 12) (y2 + 6)
Find the following product: \[\left( y^2 + \frac{5}{7} \right)\left( y^2 - \frac{14}{5} \right)\]
Evaluate the following: 109 × 107
Expand the following:
(2p + 3) (2p – 4) (2p – 5)
2p is the factor of 8pq
Simplify:
`(7/9 a + 9/7 b)^2 - ab`
Expand the following, using suitable identities.
(x + 3)(x + 7)
Using suitable identities, evaluate the following.
(995)2
