Advertisements
Advertisements
Question
Evaluate using the expansion of (a + b)2 or (a – b)2:
(9.4)2
Sum
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
shaalaa.com
Is there an error in this question or solution?
APPEARS IN
RELATED QUESTIONS
Expand : (2a + b)2
Find the square of `"a"+1/(5"a")`
Evaluate using the expansion of (a + b)2 or (a – b)2 :
(20.7)2
Find the square of 607
Find the square of 391
Write the place name and place value of digit in the following number.
35,705
Write the place value of the underlined digit.
14,95,210
Write the following numbers in expanded from.
63,570
Write the following numbers in expanded from.
36,01,478
Write in expanded form:
8907010
