January 2019 2 19 Report
1.Uprość wyrażenie
a) (x-3)(x+3)+(2+x)(2-x)
b)(x+3/2)(x-3/2)-(x-1/2)(x+1/2)
c)(2y-3)²-(3y-2)(3y+2)
d)(5y+1)(1-5y)-(1+5y)²
e)(2x-y)(2r+y)+(3x+2y)(3x-2y)
f)(y+3x)(3x-y)-(x-5y)(x+5y)

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