Question

Rút gọn : 

(3k +1) . (3k + 1) + 2012 

Answer 1

(3k+1)²+2012

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Answer 2

=(3k+1)²+2012

Answer 3

(3k+1)(3k+1) + 2012

=(3k+1)² + 2012 

Answer 4

=(3k+1)^2+2012

=3k^2+2*3k*1+1^2+2012

=3k^2+6k+1+2012

=3k^2+6k+2013

Tick nha

 

Answer 5

( 3k + 1 ) ( 3k + 1 ) + 2012 = 9k² + 3k + 3k + 1 + 2013

                                        = 9k² + 6k + 2013

                                        = 3k ( 3k + 2 ) + 2013

=> ( 3k + 1 ) ( 3k + 1 ) + 2013 = 3k ( 3k + 2 ) + 2013

Answer 6

3k +1) . (3k + 1) + 2012 = (3k+1)²+2012

Answer 7

(3k+1).(3k+1)+2012

=3k(3k+1)+1(3k+1)+2012

=9k²+3k+3k+1+2012

=9k²+6k+2013

Answer 8

(3k + 1) . (3k + 1) + 2012

= (3k + 1)² + 2012
 

Answer 9

= (3k+1)² + 2012

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Answer 10

=(3k+1)²+2012=9k²+6k+2013