Advertisements
Advertisements
Question
Evaluate using the expansion of (a + b)2 or (a – b)2:
(9.4)2
Advertisements
Solution
(9.4)2 = (10 − 0.6)2 ...[10 − 0.6 = 9.4]
(a − b)2 = a2 + 2ab − b2
= (10)2 + (0.6)2 − 2 (10) (0.6)
= 100 + 0.36 − 12
= 88 + 0.36
= 88.36
APPEARS IN
RELATED QUESTIONS
Expand : (2a + b)2
Find the square of `"a"+1/(5"a")`
Write the place value of the underlined digit.
89,99,988
Write the following numbers in standard notation
30000 + 3000 + 300 + 30 + 3
Write the following numbers in standard notation.
200000 + 7000 + 7
Write the following numbers in standard notation.
4000000 + 400 + 4
Write the following numbers in expanded from.
1,45,70,004
Represent given values in Abacus.
3 Ten crores, 7 crores, 6 ten lakhs, 7 lakhs, 4 tens and 7 ones.
Find the face value and place value of the digits coloured in the given numbers.
2010
Find the face value and place value of the digits coloured in the given numbers.
4038
