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.
(13 + x) (13 − x)
Use the Identity (x + a) (x + b) = x2 + (a + b)x + ab to find the following:
95 × 103
Expand: (2a + 3b)(2a - 3b).
Expand: (x - 3)(x - 7).
Using the identity (x + a)(x + b) = x2 + x(a + b) + ab, find the following product
(4x + 3y)(4x + 5y)
Evaluate the following, using suitable identity
51 × 52
Simplify using identities
(3p + q)(3p + r)
Multiply the following:
(x2 – 5x + 6), (2x + 7)
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
