Question

15a^2-10ab________ при a= -2 , b= -0,13ab-2b^2 ​

Answer 1

Объяснение:

1. Выносим за скобки 5а в числителе и b в Знаменателе:

$\frac{5a \times (3a - 2b)}{b \times (3a - 2b) }$

2. Сократить дробь на (3a - 2b)

$\frac{5a}{b}$

3. Подставляем

$\frac{5 \times ( - 2)}{ - 0.1}$

4. Минус в числителе и минус в Знаменателе уничтожаются, остается

$\frac{10}{0.1} = 100$

Ответ: 100

Answer 2

It seems like you're looking to evaluate the expression $15a^2 - 10ab$ and substitute $a = -2$ and $b = -0.13ab - 2b^2$. Let's break down the process step by step.

First, let's substitute the value of $b$ into the expression:

$b = -0.13ab - 2b^2$

Now plug in the value of $b$ into the expression $15a^2 - 10ab$:

$15a^2 - 10ab = 15a^2 - 10(-0.13ab - 2b^2)$

Distribute the negative sign:

$15a^2 + 1.3ab + 20b^2$

Now, substitute $a = -2$ into the expression:

$15(-2)^2 + 1.3(-2)b + 20b^2$

Simplify:

$15 \cdot 4 - 2.6b + 20b^2$

$60 - 2.6b + 20b^2$

Finally, substitute $b = -0.13ab - 2b^2$ back into the expression:

$60 - 2.6(-0.13ab - 2b^2) + 20b^2$

Distribute the negative sign:

$60 + 0.338ab + 5.2b^2 + 20b^2$

Combine like terms:

$60 + 0.338ab + 25.2b^2$

At this point, we can't simplify the expression further without knowing the specific values of $a$ and $b$. If you have specific numerical values for $a$ and $b$, you can substitute them into this expression to get the final numerical result.