Advertisements
Advertisements
Question
Expand.
(13 + x) (13 − x)
Sum
Solution
(13 + x) (13 − x)
= `(13)^2+ ("x" – "x") 13 + "x" xx (-"x")` …[∵ (x + a) (x + b) = x2 + (a + b)x + ab]
= `169 + 0 × 13 – "x"^2`
= `169 – "x"^2`
shaalaa.com
Is there an error in this question or solution?
RELATED QUESTIONS
Expand.
(3x + 4y) (3x + 5y)
Use the Identity (x + a)(x + b) = x2 + (a + b)x + ab to find the following:
501 × 502
Use the Identity (x + a) (x + b) = x2 + (a + b)x + ab to find the following:
95 × 103
Expand: (x + 2)(x + 3).
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
(x + 3)(x + 7)
Simplify using identities
(3p + q)(3p + r)
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 + 9x + 20
