Advertisements
Advertisements
प्रश्न
Find the squares of the following:
9m - 2n
बेरीज
उत्तर
Using (x + y)2
= x2 + 2xy + y2, we get
(9m - 2n)2
= (9m)2 + 2(9m)(-2n) + (-2n)2
= 81m2 - 36mn + 4n2.
shaalaa.com
या प्रश्नात किंवा उत्तरात काही त्रुटी आहे का?
APPEARS IN
संबंधित प्रश्न
Expand the following, using suitable identity:
(–2x + 3y + 2z)2
Factorise the following:
27 – 125a3 – 135a + 225a2
Evaluate the following using identities:
`(2x+ 1/x)^2`
Simplify the following expressions:
`(x + y - 2z)^2 - x^2 - y^2 - 3z^2 +4xy`
Find the cube of the following binomials expression :
\[2x + \frac{3}{x}\]
If a − b = 4 and ab = 21, find the value of a3 −b3
Evaluate:
253 − 753 + 503
If \[x^2 + \frac{1}{x^2} = 102\], then \[x - \frac{1}{x}\] =
Use the direct method to evaluate :
(2a+3) (2a−3)
If `x + (1)/x = 3`; find `x^2 + (1)/x^2`
