(6+а)²=36+12а+а²
(4х-1)²=16х²-8х+1
(5х-2у)=25х²-20ху+4у²
(х+2)²=х²+4х+4
(х-10)²=х²-20х+100
(7у-0,2)²=49у²-2,8у+0,04
(-2а+5в)²=(5в-2а)²=25в²-20ав+4а²
(х²+у²)²=х⁴+2х²у²+у⁴
(5m-(1/2)n)²=25m²-5mn+1/4n²
(-2x-3y)²=-(2x+3y)²=-(4x²+12x+9y²)=-4x²-12x-9y²
(0,2m-5n)²=0,04m²-2mn+25n²
(4y+y²)²=16y²+8y³+y⁴
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Answers & Comments
(6+а)²=36+12а+а²
(4х-1)²=16х²-8х+1
(5х-2у)=25х²-20ху+4у²
(х+2)²=х²+4х+4
(х-10)²=х²-20х+100
(7у-0,2)²=49у²-2,8у+0,04
(-2а+5в)²=(5в-2а)²=25в²-20ав+4а²
(х²+у²)²=х⁴+2х²у²+у⁴
(5m-(1/2)n)²=25m²-5mn+1/4n²
(-2x-3y)²=-(2x+3y)²=-(4x²+12x+9y²)=-4x²-12x-9y²
(0,2m-5n)²=0,04m²-2mn+25n²
(4y+y²)²=16y²+8y³+y⁴