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2013-03-02T16:05:13+01:00

 

 

 

 

 13_ A = (Y+3)(Y-7)

= Y²-7Y+3Y-21

 

 

 

= Y²-4Y-21

 

B= (2x-1)(x+5)

= 2x²+10x-x-5

=2x²+9x-5

 

14- A = (v-8)(v-2)

=v²-2v-8v+16

=v²-10v+16

 

 

B=  (3x-7)(2x-5)

=6x²-15x-14x+35

=6x²-29x+35