Question

(7a+2в)^2 - (3a-в)(4a+5в)

Answer 1

Ответ:

Всё верно но оформлять я незнаю как.

Объяснение:

Я думаю так.

Answer 2

To simplify the expression (7a + 2b)^2 - (3a - b)(4a + 5b), you'll need to expand both parts of the expression and then combine like terms. Let's do it step by step:

1. Square the first term (7a + 2b)^2: (7a + 2b)^2 = (7a + 2b)(7a + 2b)

   Now, use the distributive property to expand this expression: (7a + 2b)(7a + 2b) = 49a^2 + 14ab + 14ab + 4b^2 Simplify the middle terms: 49a^2 + 28ab + 4b^2

2. Expand the second term (3a - b)(4a + 5b): (3a - b)(4a + 5b) = 12a^2 + 15ab - 4ab - 5b^2

Now, subtract the second expression from the first expression:

(49a^2 + 28ab + 4b^2) - (12a^2 + 15ab - 4ab - 5b^2)

Now, combine like terms:

49a^2 + 28ab + 4b^2 - 12a^2 - 15ab + 4ab + 5b^2

Now, simplify the expression by combining like terms:

(49a^2 - 12a^2) + (28ab - 15ab + 4ab) + (4b^2 + 5b^2)

37a^2 + 17ab + 9b^2

So, the simplified expression is 37a^2 + 17ab + 9b^2.