Advertisements
Advertisements
प्रश्न
Using identities, evaluate 8.92
Advertisements
उत्तर
8.92 = (9.0 − 0.1)2
= (9.0)2 − 2(9.0) (0.1) + (0.1)2 [(a − b)2 = a2 − 2ab + b2 ]
= 81 − 1.8 + 0.01 = 79.21
shaalaa.com
या प्रश्नात किंवा उत्तरात काही त्रुटी आहे का?
APPEARS IN
संबंधित प्रश्न
Find the following squares by suing the identities
(xy + 3z)2
Simplify (2x +5)2 − (2x − 5)2
Using a2 − b2 = (a + b) (a − b), find 512 − 492
Use the formula to multiply the following.
(x + y) (x − y)
Use a formula to multiply of (2a – 13)(2a + 13)
Expand the following square, using suitable identities
(mn + 3p)2
The sum of areas of two squares with sides 4a and 4b is ______.
Factorise the following.
p2 + 14p + 13
Factorise `x^2 + 1/x^2 + 2 - 3x - 3/x`.
Find the length of the side of the given square if area of the square is 625 square units and then find the value of x.
