Ответ:
Объяснение: 1
(5k-3y)²=25k²-30ky+9y²
(5k+4/5k^5)²=25k²+8k^6+16/25k^10
(5a-12c)(5a+12c)=25a²-144c²
25az(2/5z³-a²)(a²+2/5z³)=25az(4/25z^6-a^4)=4az^7-25a^5z
2
a²-64b²=(a-8b)(a+8b)
125a³-1=(5a-1)(25a²+5a+1)
32t³-48t²+18t=2t(16t²-24t+9)=2t(4t-3)²
3
(3y+1)(3y-1)-(3y-4)²=7
9y²-1-(9y²-24y+16)=7
9y²-1-9y+24y-16-7=0
24y-24=0
24y=24
y=1
4
169y^4-9(3y-1)²=(13y²)²-(3(3y-1))²=(13y²-3(3y-1))(13y²+3(3y-1))=
=(13y²-9y+3)(13y²+9y-3)
(a+b)³-(a-b)³=((a+b)-(a-b))((a+b)²+(a+b)(a-b)+(a-b)²)=(a+b-a+b)(a²+2ab+b²+
+a²-b²+a²-2ab+b²)=2b(3a²+b²)
5
(1-0,4² )/(2,8×0,4-2,8)=((1-0,4)(1+0,4) / (2,8(0,4-1))= --(1+0,4) /2,8= -1,4/2,8=-1/2=-0,5
6
(m-4)²-2(4-m)(1-m)-(1-m)²=m²-8m+16-2(4-4m-m+m²)-(1-2m+m²)=m²-8m+16--8+8m+2m-2m²-1+2m-m²= -2m²+4m-7
7
b-2b^(m+1) +b^(2m+1)= делим всё на b = b/b--2b^(m+1)/b+b^(2m+1)/b=1-2b^m+b^2m=(1-b^m)²
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Answers & Comments
Ответ:
Объяснение: 1
(5k-3y)²=25k²-30ky+9y²
(5k+4/5k^5)²=25k²+8k^6+16/25k^10
(5a-12c)(5a+12c)=25a²-144c²
25az(2/5z³-a²)(a²+2/5z³)=25az(4/25z^6-a^4)=4az^7-25a^5z
2
a²-64b²=(a-8b)(a+8b)
125a³-1=(5a-1)(25a²+5a+1)
32t³-48t²+18t=2t(16t²-24t+9)=2t(4t-3)²
3
(3y+1)(3y-1)-(3y-4)²=7
9y²-1-(9y²-24y+16)=7
9y²-1-9y+24y-16-7=0
24y-24=0
24y=24
y=1
4
169y^4-9(3y-1)²=(13y²)²-(3(3y-1))²=(13y²-3(3y-1))(13y²+3(3y-1))=
=(13y²-9y+3)(13y²+9y-3)
(a+b)³-(a-b)³=((a+b)-(a-b))((a+b)²+(a+b)(a-b)+(a-b)²)=(a+b-a+b)(a²+2ab+b²+
+a²-b²+a²-2ab+b²)=2b(3a²+b²)
5
(1-0,4² )/(2,8×0,4-2,8)=((1-0,4)(1+0,4) / (2,8(0,4-1))= --(1+0,4) /2,8= -1,4/2,8=-1/2=-0,5
6
(m-4)²-2(4-m)(1-m)-(1-m)²=m²-8m+16-2(4-4m-m+m²)-(1-2m+m²)=m²-8m+16--8+8m+2m-2m²-1+2m-m²= -2m²+4m-7
7
b-2b^(m+1) +b^(2m+1)= делим всё на b = b/b--2b^(m+1)/b+b^(2m+1)/b=1-2b^m+b^2m=(1-b^m)²