zastosuj wzory skróconego mnożenia
a) (3y-5x) (5y+5x)
b)(-3)
a) (3y-5x) (5y+5x)=15y²+15xy-25xy-25x²=15y²-25x²-10xy
b)(√3-3√2)²=(√3)²-2*√3*√2+(3√2)²=3-2√6+18=21-2√6
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a) (3y-5x) (5y+5x)=15y²+15xy-25xy-25x²=15y²-25x²-10xy
b)(√3-3√2)²=(√3)²-2*√3*√2+(3√2)²=3-2√6+18=21-2√6