Question

2)36-b^2.3)4m^2-25.4)16n^2-81. 5)9y^2-1. 6)1-49x^2. 7)0,04a^2-b^2. 8)a^4-0,09. 7 класс

Answer 1

2) 36 - b² = (6-b)(6+b)
3) 4m² - 25 = (2m-5)(2m+5)
4) 16n² - 81 = (4n-9)(4n+9)
5) 9y² -1 = (3y-1)(3y+1)
6) 1 - 49x² = (1-7x)(1+7x)
7) 0,04a² - b² = (0,2a-b)(0,2a+b)
8) a^4 - 0,09 = (a²-0,3)(a²+0,3)

Answer 2

It seems like you have provided a list of algebraic expressions, and I assume you'd like me to perform some operations or simplify them. I'll go through each expression and provide the simplification or operation if applicable:

1. 36 - b^2: This expression cannot be simplified further unless you have a specific value for 'b'.

2. 4m^2 - 25: This is a difference of squares. You can factor it as follows: 4m^2 - 25 = (2m + 5)(2m - 5)

3. 16n^2 - 81: This is also a difference of squares. You can factor it as follows: 16n^2 - 81 = (4n + 9)(4n - 9)

4. 9y^2 - 1: This is a difference of squares. You can factor it as follows: 9y^2 - 1 = (3y + 1)(3y - 1)

5. 1 - 49x^2: This is also a difference of squares. You can factor it as follows: 1 - 49x^2 = (1 + 7x)(1 - 7x)

6. 0.04a^2 - b^2: This expression cannot be simplified further unless you have specific values for 'a' and 'b'.

7. a^4 - 0.09: This is the difference of squares. 0.09 can be written as 0.3^2. You can factor it as follows: a^4 - 0.09 = (a^2 + 0.3)(a^2 - 0.3)

If you have any other specific operations or questions related to these expressions or any other topic, feel free to ask!