Advertisements
Advertisements
Question
Find the square of 3a − 2b − 5c
Advertisements
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
APPEARS IN
RELATED QUESTIONS
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 :
(415)2
Write the place name and place value of digit in the following number.
35,705
Write the following numbers in standard notation
30000 + 3000 + 300 + 30 + 3
Write the following numbers in standard notation.
4000000 + 400 + 4
Represent given values in Abacus.
Write the number name of the following numbers represented in the Abacus
Find the face value and place value of the digits coloured in the given numbers.
1379
Find the face value and place value of the digits coloured in the given numbers.
9876
Find the face value and place value of the digits coloured in the given numbers.
8965
Write in expanded form:
74836
