Advertisements
Advertisements
प्रश्न
Use the direct method to evaluate :
(4+5x) (4−5x)
बेरीज
Advertisements
उत्तर
Note: (a+b) (a−b) = a2 − b2
(4+5x) (4−5x)
= (4)2 − (5x)2
= 16 − 25x2
shaalaa.com
या प्रश्नात किंवा उत्तरात काही त्रुटी आहे का?
APPEARS IN
संबंधित प्रश्न
Factorise the following:
8a3 – b3 – 12a2b + 6ab2
Factorise:
27x3 + y3 + z3 – 9xyz
Write the expanded form:
`(-3x + y + z)^2`
Evaluate of the following:
1043 + 963
Find the following product:
\[\left( \frac{3}{x} - \frac{5}{y} \right) \left( \frac{9}{x^2} + \frac{25}{y^2} + \frac{15}{xy} \right)\]
If \[x + \frac{1}{x} = 3\] then \[x^6 + \frac{1}{x^6}\] =
Evaluate, using (a + b)(a - b)= a2 - b2.
399 x 401
Simplify:
(2x - 4y + 7)(2x + 4y + 7)
The coefficient of x in the expansion of (x + 3)3 is ______.
If `49x^2 - b = (7x + 1/2)(7x - 1/2)`, then the value of b is ______.
