Mnożenie sum algebraicznych. PROSZE FAST!!
a) (2x+6)(3x-2)=
b) 3(3x-8)(2x+4)=
c) (3x-2)(3x+2)=
Witam ,
I.
(2x+6)(3x-2)=6x²-4x+18x-12=6x²+14x-12
II.
3(3x-8)(2x+4)=(9x-24)(2x+4)=18x²+36x-48x-96=18x²-12x-96
III.
(3x-2)(3x+2)= 9x²+6x-6x-4=9x²-4
Pozdrawiam
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Witam ,
I.
(2x+6)(3x-2)=6x²-4x+18x-12=6x²+14x-12
II.
3(3x-8)(2x+4)=(9x-24)(2x+4)=18x²+36x-48x-96=18x²-12x-96
III.
(3x-2)(3x+2)= 9x²+6x-6x-4=9x²-4
Pozdrawiam