Advertisements
Advertisements
Question
Using suitable identities, evaluate the following.
104 × 97
Evaluate
Advertisements
Solution
We have,
104 × 97 = (100 + 4)(100 – 3)
= (100)2 + (4 – 3)100 + 4 × (–3) ...[Using the identity, (x + a)(x + b) = x2 + (a + b)x + ab]
= 10000 + 100 – 12
= 10088
shaalaa.com
Is there an error in this question or solution?
Chapter 7: Algebraic Expression, Identities and Factorisation - Exercise [Page 233]
APPEARS IN
RELATED QUESTIONS
Expand.
(a + 2) (a − 1)
Expand.
(9x − 5t) (9x + 3t)
Expand.
`(m + 2/3)(m − 7/3)`
Expand.
`(1/y + 4)(1/y - 9)`
Expand: (y + 4)(y - 3)
x2 + (a + b)x + ab = (a + b)(x + ab)
Using suitable identities, evaluate the following.
101 × 103
Using suitable identities, evaluate the following.
98 × 103
The following expression is the area of a rectangle. Find the possible length and breadth of the rectangle.
x2 – 6x + 8
The following expression is the area of a rectangle. Find the possible length and breadth of the rectangle.
x2 – 3x + 2
