Question

5+а⁴+a; (a-b) (a+b) ;7x³y 1,5x²y​

Answer 1

1. Не знаю, может там ошибка

$5 + {a}^{4} + a =$

2.

$(a - b)(a + b) = {a}^{2} - {b}^{2}$

3.

$7x {}^{3} y \times 1.5x {}^{2} y = 10.5x {}^{3 + 2} y {}^{1} \times y {}^{1} = 10.5x {}^{5} y {}^{1 + 1} = 10.5 {x}^{5} {y}^{2}$

Answer 2

It looks like you've provided three mathematical expressions. Let's break them down:

1. $5 + a^4 + a$: This is a polynomial expression. There's not much you can simplify here unless you have a specific value for $a$.

2. $(a - b)(a + b)$: This is a difference of squares. You can use the formula $a^2 - b^2 = (a - b)(a + b)$ to simplify it: $(a - b)(a + b) = a^2 - b^2$

3. $\frac{7x^3y}{1.5x^2y}$: To simplify this fraction, you can divide the coefficients and subtract the exponents of the variables: $\frac{7x^3y}{1.5x^2y} = \frac{7}{1.5} \cdot \frac{x^3}{x^2} \cdot \frac{y}{y}$

   Simplify each part: $\frac{7}{1.5} \cdot \frac{x^3}{x^2} \cdot \frac{y}{y} = \frac{14}{3} \cdot x^{3-2} \cdot 1 = \frac{14}{3}x$

So, in summary:

1. $5 + a^4 + a$ is a polynomial expression.
2. $(a - b)(a + b)$ simplifies to $a^2 - b^2$.
3. $\frac{7x^3y}{1.5x^2y}$ simplifies to $\frac{14}{3}x$.