September 2018 2 83 Report

Tam, gdzie się da trzeba zastosować wzór skróconego mnożenia. Z góry dzięki ;)

a)(x-1)²-(x-1)(x+1)=

b) (x+3)²-(x-3)²-1²=

c)(x-4y)²-(4y+x)²=

d)(2x+3y)(2x-3y)-(2x-3y)²=


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