Question

A^2-b^2/(a+b) где а=5, b=7

Answer 1

Решение задания смотри на фотографии

Answer 2

5^2-7^2/(5+7)=25-49/12=-24/12=-2

Answer 3

To evaluate the expression A^2 - b^2 / (a + b) with a = 5 and b = 7, we first need to calculate A^2 and b^2, and then substitute the values into the expression.

Given that a = 5 and b = 7, let's calculate:

A^2 = a^2 = 5^2 = 25 b^2 = 7^2 = 49

Now, substitute these values into the expression:

A^2 - b^2 / (a + b) = 25 - 49 / (5 + 7)

Next, perform the operations inside the parentheses:

A^2 - b^2 / (a + b) = 25 - 49 / 12

Now, calculate the division:

A^2 - b^2 / (a + b) = 25 - 4.083...

Finally, subtract:

A^2 - b^2 / (a + b) ≈ 20.916...

So, the result is approximately 20.916.