Question

Вычислить (√7-6) (√7+6)

Answer 1

Исходное выражение=7-36=-25

Answer 2

To calculate the value of the expression (√7 - 6) (√7 + 6), we can use the difference of squares formula, which states that (a - b) (a + b) = a^2 - b^2.

In this case, a = √7 and b = 6:

(√7 - 6) (√7 + 6) = (√7)^2 - (6)^2

Now, let's calculate (√7)^2 and (6)^2:

(√7)^2 = 7 (6)^2 = 36

Now, we can substitute these values back into the formula:

(√7 - 6) (√7 + 6) = 7 - 36

And finally, perform the subtraction:

(√7 - 6) (√7 + 6) = -29

So, the value of the expression (√7 - 6) (√7 + 6) is -29.