Advertisements
Advertisements
प्रश्न
Use the direct method to evaluate :
(0.5−2a) (0.5+2a)
योग
Advertisements
उत्तर
Note: (a+b) (a−b) = a2 − b2
(0.5−2a) (0.5+2a)
= (0.5)2 − (2a)2
= 0.25 − 4a2
shaalaa.com
क्या इस प्रश्न या उत्तर में कोई त्रुटि है?
APPEARS IN
संबंधित प्रश्न
Evaluate the following product without multiplying directly:
103 × 107
Write in the expand form: `(2x - y + z)^2`
If a2 + b2 + c2 = 16 and ab + bc + ca = 10, find the value of a + b + c.
If \[x^2 + \frac{1}{x^2}\], find the value of \[x^3 - \frac{1}{x^3}\]
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: (2a + 0.5) (7a − 0.3)
Expand the following:
(a + 4) (a + 7)
Simplify by using formula :
(1 + a) (1 - a) (1 + a2)
If `"p" + (1)/"p" = 6`; find : `"p"^4 + (1)/"p"^4`
Simplify:
(4x + 5y)2 + (4x - 5y)2
