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leranenasheva
@leranenasheva
August 2022
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40 БАЛЛОВ!!!!!!!Ребят можно решение варианта А1(полностью)а не готовый ответ)
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oganesbagoyan
Verified answer
1)
а
) (3-- a))(3+a)=9-a²;
б)
(2a-b)(2a+b)=4a² -b²;
в)
(x² -1)(x² +1)=x^4 -1.
2)
а)
y³ -100 = (y-10)(y+10) ;
б)
y² -0,16=(y-0,4)(y+0,4);
в)
a^4 -25=(a² -5)(a²+5).
3)
а)
(x-1)(x+1) -x(x-2) =0;
x² -1 -x²+2x=0;
x=1/2
б)
(x-2)(x+2)=0;
x-2=0 ⇒x₁=2 ;
x+2=-
0
⇒x₂=-2.
4)
а)
y³+8 =y³ +2³ = (y+2)(y² - 2y +1) ;
б)
a³-1=(a-1)(a²+a+1).
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Answers & Comments
Verified answer
1)а) (3-- a))(3+a)=9-a²;
б) (2a-b)(2a+b)=4a² -b²;
в) (x² -1)(x² +1)=x^4 -1.
2)
а) y³ -100 = (y-10)(y+10) ;
б) y² -0,16=(y-0,4)(y+0,4);
в) a^4 -25=(a² -5)(a²+5).
3)
а) (x-1)(x+1) -x(x-2) =0;
x² -1 -x²+2x=0;
x=1/2
б) (x-2)(x+2)=0;
x-2=0 ⇒x₁=2 ;
x+2=-0 ⇒x₂=-2.
4)
а) y³+8 =y³ +2³ = (y+2)(y² - 2y +1) ;
б) a³-1=(a-1)(a²+a+1).