Advertisements
Advertisements
Question
Use a suitable identity to get the following products.
(x + 3) (x + 3)
Advertisements
Solution
The product will be as follows
(x + 3) (x + 3) = (x + 3)2
= (x)2 + 2(x) (3) + (3)2 [(a + b)2 = a2 + 2ab + b2]
= x2 + 6x + 9
APPEARS IN
RELATED QUESTIONS
Use a suitable identity to get the following products.
`(x/2 + (3y)/4)(x/2 + (3y)/4)`
Simplify (2.5p − 1.5q)2 − (1.5p − 2.5q)2
Simplify (m2 − n2m)2 + 2m3n2
Using identities, evaluate 297 × 303
Using a2 − b2 = (a + b) (a − b), find 12.12 − 7.92
If a + b = 10 and ab = 18, find the value of a2 + b2
If a + b = 5 and a2 + b2 = 13, then ab = ?
Factorise the following, using the identity a2 + 2ab + b2 = (a + b)2.
9x2 + 30x + 25
The area of a rectangle is x2 + 7x + 12. If its breadth is (x + 3), then find its length.
Verify the following:
(a + b)(a + b)(a + b) = a3 + 3a2b + 3ab2 + b3
