Advertisements
Advertisements
Question
Find the square of 3a − 2b − 5c
Sum
Solution
(3a − 2b − 5c)2 = (3a)2 + (−2b)2 + (−5c)2 + 2 × 3a × −2b + 2 × (−2b)(−5c) + 2 × −5c × 3a
= 9a2 + 4b2 + 25c2 − 12ab + 20bc − 30ca
shaalaa.com
Is there an error in this question or solution?
APPEARS IN
RELATED QUESTIONS
Find the square of `2"a"-1/"a"`
Find the square of x − 2y +1
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 :
(188)2
Evaluate using the expansion of (a + b)2 or (a – b)2 :
(20.7)2
Find the square of 9.7
Write the following numbers in expanded from.
63,570
Find the face value and place value of the digits coloured in the given numbers.
5136
Write in expanded form:
74836
Write in expanded form:
8907010
