5(5x-1)-2, 5x=1/5(32, 5-2, 5x) (0, 4x- 1/2x+1)=2, 8-4x
Ответы
Объяснение:
1) 2х² + 4ху + 2у²;=2(x²+2xy+y²)=2(x+y)²=2(x+y)(x+y)
2) 6х² - 12ху + 6у²=6(x²-2xy+y²)=6(x-y)²=6(x-y)(x-y)
3) 3а² – 6а + 3=3(a²-2a+1)=3(a-1)²=3(a-1)(a-1)
4) 2ху² + 4ху + 2х=2x(y²+2y+1)=2x(y+1)²=2x(y+1)(y+1)
2)(1,1х2 – 6у)²– (1,1х2 – 6у)(1,1х² + 6у)=1,21x^4-13,2x²y+36y²-(1,21x^4-36y²)=
=1,21x^4-13,2x²y+36y²-1,21x^4+36y²=72y²-13,2x²y
2) (2,3а – 7b³)(2,3а + 7b³) – (2,3а + 7b3)²= =5,29a²-49b^6-(5,29a²+32,2ab³+49b^6)=
5,29a²-49b^6-5,29a²-32,ab³-49b^6= -98b^6-32,2ab³
3) 1000 + a6 – (a² + 10)(a4 – 10a² + 100)=1000+a^6-(a^6+1000)=1000+a^6-a^6-1000=0
4) (1,1d – c³)(1,21 d² + 1,1c³d + c6) – 1,33 d³+ 2c9=(1,1d)³-(c^3)^3-1,33d^3+2x^9=
=1,331d³-c^9-1,33d³+2c^9=0,001d³+c^9
1) 18 - 16х = -30х - 10, 2) -7х + 2 = 3х - 1, 3) 10 - 2х = 12 - х,
-16х + 30х = -10 - 18, -7х - 3х = -1 - 2, -2х + х = 12 - 10,
14х = -28, -10х = -3, -х = 2,
х = -28 : 14, х = -3 : (-10), х = -2;
х = -2; х = 0,3;
4) 6х - 19 = -2х - 15, 5) 0,2х + 3,4 = 0,6х - 2,6, 6) 5/6х + 12 = 1/4х - 2,
6х + 2х = -15 + 19, 0,2х - 0,6х = -2,6 - 3,4, 12(5/6х + 12) = 12(1/4х - 2),
8х = 4, -0,4х = -6, 10х + 144 = 3х - 24,
х = 4 : 8, х = -6 : (-0,4), 10х - 3х = -24 - 144,
х = 0,5; х = 15; 7х = -168,
х = -168 : 7,
х = -24.
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25x-5-2,5x=1/5*325/10-1/5*25/10x
22,5x-5=65-0,5
22,5x-5-65+0,5x=0
23x=60
x=2,6