Advertisements
Advertisements
प्रश्न
Use the direct method to evaluate :
(2+a) (2−a)
बेरीज
Advertisements
उत्तर
Note: (a+b) (a−b) = a2 − b2
(2+a) (2−a) = (2)2 − (a)2
= 4 − a2
shaalaa.com
या प्रश्नात किंवा उत्तरात काही त्रुटी आहे का?
APPEARS IN
संबंधित प्रश्न
Use suitable identity to find the following product:
(x + 4) (x + 10)
Factorise the following using appropriate identity:
9x2 + 6xy + y2
Factorise:
`2x^2 + y^2 + 8z^2 - 2sqrt2xy + 4sqrt2yz - 8xz`
Simplify `(x^2 + y^2 - z)^2 - (x^2 - y^2 + z^2)^2`
Find the value of 4x2 + y2 + 25z2 + 4xy − 10yz − 20zx when x = 4, y = 3 and z = 2.
Find the value of 64x3 − 125z3, if 4x − 5z = 16 and xz = 12.
Simplify of the following:
\[\left( x + \frac{2}{x} \right)^3 + \left( x - \frac{2}{x} \right)^3\]
Find the following product:
(3x + 2y) (9x2 − 6xy + 4y2)
Find the following product:
\[\left( \frac{2}{x} + 3x \right) \left( \frac{4}{x^2} + 9 x^2 - 6 \right)\]
If a + b + c = 0, then \[\frac{a^2}{bc} + \frac{b^2}{ca} + \frac{c^2}{ab} =\]
