Question

1.(b-y)² = b - 2by - y²
2.49 - c² = (49 - c)(49 + c)
3.(x - 10)² = x² - 20x + 10
4.(2a + 1)² = 4a² + 2a + 1
5.81-b² = (b - 9) (9 + b)
6.x² + 2xy + y² = (x + y)
7 (3a-2b)² = 9a²+12 ab + 4b²
8. (8 - x)(8 + x)=64 + x²
9.(2y + 1)² = 2y² + 4y + 1
10.(2x - 1)² = 4x² + 1
11.{5x - 1)(5x + 1) = 5 xỉ + 1
12.(2x + 3)2 = 4x2 + 6x + 9
13. (2x - 5)² = 4x² - 20 x + 5
14.625-16a² = (25+ 16a) (25+16a)
15.(y - 4)(y + 4) = y² - 4
16. (4x + 2) (2 - 4x) = 4-4x²
17.(x + 1)² = 1-x+x²
18.121-4y2 = (11-4y)(11+ 4y)
19.(2b + 3a)2 = 2b² + 6ab + 9a²
20.36x² = (36-x) (36 + x)
21.(7x-3)(7x + 3) = 49x² - 3
22. (6-2y)² = 36+12y + 4y²
23.(10 + 2a)(2a + 10) =100 + 4a²
24 (8K + 3)² = 64K + 48K + 9
25.(3 + 2y) (3 + 2y)=9 +4y2
26.(1 + x)2=1+xX+X²
27.4y² + 4y + 1 = (4y + 1)²
28.9a²-4b² = (9a-4b)(9a + 4b)
найдите верные и не верные​

Answer 1

Ответ:

Верно:7,12,24,25

Неверно:1,2,3,4,5,6,8,9,10,11,13,14,15,16,17,18,19,20,21,22,23,26,27,28