Advertisements
Advertisements
प्रश्न
Using suitable identities, evaluate the following.
98 × 103
Advertisements
उत्तर
We have,
98 × 103 = (100 – 2)(100 + 3)
= (100)2 + (–2 + 3)100 + (–2) × 3 ...[Using the identity, (x + a)(x + b) = x2 + (a + b)x + ab]
= 10000 + 100 – 6
= 10094
APPEARS IN
संबंधित प्रश्न
Expand.
(3x + 4y) (3x + 5y)
Expand: `(m + 3/2)(m + 1/2)`.
Expand: (x - 3)(x - 7).
Expand (2n – 1)(2n + 3)
Using the identity (x + a)(x + b) = x2 + x(a + b) + ab, find the following product
(4x + 3y)(4x + 5y)
Using the identity (x + a)(x + b) = x2 + x(a + b) + ab, find the following product
(8 + pq)(pq + 7)
Multiply the following:
(x2 – 5x + 6), (2x + 7)
Using suitable identities, evaluate the following.
104 × 97
The following expression is the area of a rectangle. Find the possible length and breadth of the rectangle.
x2 – 7x + 10
The following expression is the area of a rectangle. Find the possible length and breadth of the rectangle.
x2 + 9x + 20
