October 2018 1 23 Report

Czy ktoś może mi wytłuamaczyć?

Jak uprościć wyrażenia?

a) (x-3)(x+3)+(2+x))(2-x)

b)(x+⅔)(x-⅔)-(x-½)(x+½)

c)(2y-3)²-(3y-2)(3y+2)

d)(5y+1)(1-5y)-(1+5y)²

e)(2x-y)(2x+y)+(3x+2y)(3x-2y)

f) (y+3x)(3x-y)-(x-5y)(x+5y)


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