Advertisements
Advertisements
प्रश्न
Expand : (a – 2b)2
योग
Advertisements
उत्तर
(a – 2b)2 = (a)2 + (2b)2 − 2 × a × 2b ...[(a−b)2 = a2 + b2 − 2ab]
= a2 + 4b2 − 4ab
shaalaa.com
क्या इस प्रश्न या उत्तर में कोई त्रुटि है?
APPEARS IN
संबंधित प्रश्न
Expand : (2a + b)2
Evaluate using the expansion of (a + b)2 or (a – b)2 :
(92)2
Evaluate using the expansion of (a + b)2 or (a – b)2:
(9.4)2
Write the place value of the underlined digit.
78,95,210
Write the place name and place value of digit in the following number.
82,74,508
Write the place value of the underlined digit.
14,95,210
Write the following numbers in standard notation.
200000 + 7000 + 7
Write the following numbers in expanded from.
1,45,70,004
Find the face value and place value of the digits coloured in the given numbers.
1379
Circle the correct one.
| a | 5 thousand + 3 hundred + 2 ones | 5320, 5302 |
| b | The place value of 5 in 3758 | 50, 500 |
| c | Three thousand six hundred and sixty | 3060, 3660 |
| d | 4000 + 600 + 90 | 4690, 4609 |
