Advertisements
Advertisements
प्रश्न
Using suitable identities, evaluate the following.
105 × 95
मूल्यांकन
Advertisements
उत्तर
We have,
105 × 95 = (100 + 5)(100 – 5)
= (100)2 – (5)2 ...[Using the identity, (a + b)(a – b) = a2 – b2]
= 10000 – 25
= 9975
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
Simplify the following using the formula: (a − b)(a + b) = a2 − b2: (82)2 − (18)2
Simplify the following using the formula: (a − b)(a + b) = a2 − b2: (467)2 − (33)2
Find the value of x, if 4x = (52)2 − (48)2.
Find the following product: (x + 7) (x − 5)
Find the following product: (3x − 4y) (2x − 4y)
Expand the following:
(2x + 3y + 4z)2
Simplify:
(pq – qr)2 + 4pq2r
Expand the following, using suitable identities.
(0.9p – 0.5q)2
Perform the following division:
(3pqr – 6p2q2r2) ÷ 3pq
Perform the following division:
(– qrxy + pryz – rxyz) ÷ (– xyz)
