Advertisements
Advertisements
प्रश्न
Simplify by using formula :
(5x - 9) (5x + 9)
योग
Advertisements
उत्तर
(5x - 9) (5x + 9)
= (5x)2 - (9)2
= 25x2 - 81
(Using identity : (a + b) (a - b) = a2 - b2).
shaalaa.com
क्या इस प्रश्न या उत्तर में कोई त्रुटि है?
APPEARS IN
संबंधित प्रश्न
Evaluate the following using identities:
(1.5x2 − 0.3y2) (1.5x2 + 0.3y2)
if `x + 1/x = 11`, find the value of `x^2 + 1/x^2`
Simplify (2x + p - c)2 - (2x - p + c)2
If a − b = −8 and ab = −12, then a3 − b3 =
If a2 + b2 + c2 − ab − bc − ca =0, then
Find the squares of the following:
3p - 4q2
Evaluate the following without multiplying:
(95)2
If `"a" - 1/"a" = 10;` find `"a" + 1/"a"`
If a2 - 3a - 1 = 0 and a ≠ 0, find : `"a" - (1)/"a"`
Simplify:
(2x - 4y + 7)(2x + 4y + 7)
