Advertisements
Advertisements
प्रश्न
Use a formula to multiply of (x - 5)(x + 5).
बेरीज
Advertisements
उत्तर
We use the formula: (x - a)(x + a) = x2 - a2
(x – 5)(x + 5)
(x2 - 52) = x2 - 25
shaalaa.com
या प्रश्नात किंवा उत्तरात काही त्रुटी आहे का?
APPEARS IN
संबंधित प्रश्न
Simplify (a2 − b2)2
Using a2 − b2 = (a + b) (a − b), find 1532 − 1472
Using (x + a) (x + b) = x2 + (a + b) x + ab, find 103 × 104
Using (x + a) (x + b) = x2 + (a + b) x + ab, find 5.1 × 5.2
(x2 + y2)(y2 + x2) = (x2 + y2)2
Simplify: (a + b)2 – 4ab
Factorise the following, using the identity a2 + 2ab + b2 = (a + b)2.
4x2 + 4x + 1
Factorise the following.
x2 + 9x + 20
The cost of a chocolate is Rs (x + y) and Rohit bought (x + y) chocolates. Find the total amount paid by him in terms of x. If x = 10, find the amount paid by him.
If a2 + b2 = 74 and ab = 35, then find a + b.
