Question

Simplify as far as possible without a calculator.

(
3
−
√
7
)
(
3
−
√
7
)

Answer 1

- 26

Explanation:

(3−√7)(3−√7)

9 - 3√7 -3√7 + √7√7

9 - 6√49 + √49

9 - 6*7 + 7

9 - 42 + 7

= -26