Advertisements
Advertisements
प्रश्न
Use the direct method to evaluate :
(xy+4) (xy−4)
योग
Advertisements
उत्तर
Note: (a+b) (a−b) = a2 − b2
(xy+4) (xy−4) = (xy)2 − (4)2
= x2y2 − 16
shaalaa.com
क्या इस प्रश्न या उत्तर में कोई त्रुटि है?
APPEARS IN
संबंधित प्रश्न
if `x^2 + 1/x^2 = 79` Find the value of `x + 1/x`
If \[x - \frac{1}{x} = 5\], find the value of \[x^3 - \frac{1}{x^3}\]
If \[3x + \frac{2}{x} = 7\] , then \[\left( 9 x^2 - \frac{4}{x^2} \right) =\]
Find the square of : 3a + 7b
If a2 - 5a - 1 = 0 and a ≠ 0 ; find:
- `a - 1/a`
- `a + 1/a`
- `a^2 - 1/a^2`
Use the direct method to evaluate :
(2+a) (2−a)
Use the direct method to evaluate :
(ab+x2) (ab−x2)
If p + q = 8 and p - q = 4, find:
p2 + q2
If `x^2 + (1)/x^2 = 18`; find : `x - (1)/x`
Find the value of x3 – 8y3 – 36xy – 216, when x = 2y + 6
