Question

1)5a+b a=2)a2+3ab-b2 ab=

Answer 1

Ответ:

1) 5 2) 3

Объяснение:

это правильно я знаю мне 5 поставили

Answer 2

It seems like you're asking for the value of the expression "a2 + 3ab - b2" when given the values of "a" and "b" as "5a + b" and "a," respectively. Let's solve this step by step:

Given:

1. a = 5a + b
2. ab = a

Let's start by substituting the value of "a" from equation 1 into equation 2: ab = 5a + b

Now, we can substitute the value of "a" from equation 2 into the expression "a2 + 3ab - b2": a2 + 3ab - b2 = (5a + b)2 + 3(5a + b)b - b2 (substituting a = 5a + b) = 25a2 + 10ab + b2 + 15ab - b2 - b2 = 25a2 + 25ab - b2

Now, substitute the value of "ab" from equation 1 into the above expression: 25a2 + 25ab - b2 = 25a2 + 25(5a + b) - b2 (substituting ab = 5a + b) = 25a2 + 125a + 25b - b2

So, the expression "a2 + 3ab - b2" when given the values of "a" and "b" as "5a + b" and "a," respectively, simplifies to: 25a2 + 125a + 25b - b2