Advertisements
Advertisements
प्रश्न
Use the direct method to evaluate :
(x+1) (x−1)
योग
Advertisements
उत्तर
Note: (a+b) (a−b) = a2 − b2
(x+1) (x−1) = (x)2 − (1)2
= x2 − 1
shaalaa.com
क्या इस प्रश्न या उत्तर में कोई त्रुटि है?
APPEARS IN
संबंधित प्रश्न
Use suitable identity to find the following product:
(3 – 2x) (3 + 2x)
If 2x+3y = 13 and xy = 6, find the value of 8x3 + 27y3
Evaluate:
253 − 753 + 503
If x + y + z = 8 and xy +yz +zx = 20, find the value of x3 + y3 + z3 −3xyz
Find the square of : 3a - 4b
The number x is 2 more than the number y. If the sum of the squares of x and y is 34, then find the product of x and y.
Evaluate: (6 − 5xy) (6 + 5xy)
If `"a"^2 - 7"a" + 1` = 0 and a = ≠ 0, find :
`"a" + (1)/"a"`
Factorise the following:
`(2x + 1/3)^2 - (x - 1/2)^2`
Factorise the following:
16x2 + 4y2 + 9z2 – 16xy – 12yz + 24xz
