Answer:
54 -√2 (answer).
Explanation:
(7-2 square root) (8+2 square root)
= (7 - √2)(8 + √2)
= 7( 8 + √2) - √2(8 + √2)
= 56 + 7√2 - 8√2 - 2
= 54 -√2 (answer).
54 - √2
(7 - √2)(8 + √2) = 7(8 + √2) - √2(8 + √2)
= 7×8 + 7√2 - 8√2 - √4
= 7×8 + (7√2 - 8√2) - √4
= 56 - √2 - 2
= 56 + 2 + 15√2
= 54 - √2
5.3m questions
6.9m answers