Question

Известно, что а + b = 8, ab = -11. Найдите значение выражения (a - b)² ДАМ 30 баллов!

Answer 1

Ответ:

a+b=8    

ab=-11

(a-b)²=a²-2ab+b²+2ab-2ab=(a+b)²-4ab=8²-4*(-11)=64+44=108

Объяснение:

Answer 2

Ответ:

(a - b)²=(a-b)(a-b)=a²-ab-ab+b²=a²+b²-2ab-2ab=(a+b)²-4ab

Если a+b=8, ab= -11, то 8²-4*(-11)=64+44=108

Answer 3

Calculating the Value of (a - b)²

To find the value of the expression (a - b)², we can use the given values of a and b, which are a = 8 and ab = -11.

First, let's calculate the value of b: - From the given information, we know that a * b = -11. - Since a = 8, we can solve for b: 8 * b = -11. - Therefore, b = -11 / 8.

Now that we have the values of a and b, we can proceed to calculate (a - b)²: - Substitute the values of a and b into the expression: (8 - (-11/8))². - Simplify the expression: (8 + 11/8)².

Let's calculate the value of (a - b)²: - (8 + 11/8)² = (8 + 1.375)² = (9.375)². - (9.375)² = 87.890625.

The value of (a - b)² is 87.890625.