Question

1) (5+х)²= 2) (1-3х)²= 3) (3а-10b)²= 4) (х+4)(х-4)= 5) (2х-5)²=

Answer 1

Ответ:

1) 25+10x+x^2

2) 1-6x+9x^2

3)9a^2 - 60ab + 100b^2

4) (x^2)-16

5) 4x^2 - 20x + 25

Объяснение:

x^2 - это икс в квадрате

Так как вопроса никакого не стоит , просто используем формулы сокращённого умножения

Answer 2

It looks like you've provided a list of mathematical expressions. Let's solve each of them step by step:

1. (5 + x)²: First, apply the formula for squaring a binomial: (a + b)² = a² + 2ab + b². So, (5 + x)² = 5² + 2(5)(x) + x² = 25 + 10x + x².

2. (1 - 3x)²: Similarly, apply the formula: (a - b)² = a² - 2ab + b². (1 - 3x)² = 1² - 2(1)(3x) + (3x)² = 1 - 6x + 9x².

3. (3a - 10b)²: Following the formula: (a - b)² = a² - 2ab + b². (3a - 10b)² = (3a)² - 2(3a)(10b) + (10b)² = 9a² - 60ab + 100b².

4. (x + 4)(x - 4): This is a difference of squares, which follows the pattern: (a + b)(a - b) = a² - b². (x + 4)(x - 4) = x² - 4² = x² - 16.

5. (2x - 5)²: Using the formula for squaring a binomial again: (2x - 5)² = (2x)² - 2(2x)(5) + 5² = 4x² - 20x + 25.

Please note that these are the simplified forms of the given expressions. If you need further assistance or clarification on any of these steps, please let me know!