Choose the correct product of (7x _ 6) 2.

49x2 + 84x + 36

49x2 _ 36

49x2 + 36

49x2 _ 84x + 36

The answer is 49x2 _ 84x + 36

(7x - 6) ² is the square of the difference. The general formula would be:

(a - b) ² = a² - 2ab + b²

In our expression (7x - 6) ², a would be 7x and b would be 6:

(7x - 6) ² = (7x) ² - 2 · 7x · 6 + 6²

= 7² · x² - 84x + 36

= 49x² - 84x + 36