Advertisements
Advertisements
प्रश्न
Using the identity (x + a)(x + b) = x2 + x(a + b) + ab, find the following product
(x + 3)(x + 7)
Advertisements
उत्तर
(x + 3)(x + 7)
Let a = 3, b = 7
(x + 3)(x + 7) is of the form x2 + x(a + b) + ab
(x + 3)(x + 7) = x2 + x(3 + 7) + (3 × 7)
= x2 + 10x + 21
APPEARS IN
संबंधित प्रश्न
Expand.
(a + 2) (a − 1)
Expand.
(13 + x) (13 − x)
Use the Identity (x + a) (x + b) = x2 + (a + b)x + ab to find the following:
95 × 103
Expand: `(m + 3/2)(m + 1/2)`.
Using the identity (x + a)(x + b) = x2 + x(a + b) + ab, find the following product
(4x + 3y)(4x + 5y)
Multiply the following:
(x2 – 5x + 6), (2x + 7)
Using suitable identities, evaluate the following.
104 × 97
Using suitable identities, evaluate the following.
101 × 103
Using suitable identities, evaluate the following.
10.1 × 10.2
The following expression is the area of a rectangle. Find the possible length and breadth of the rectangle.
x2 – 7x + 10
