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Multiply radical expressions
1) Multiply radical expressions (9 - √7) (2 + √7).
11 + 5√7
11 + 4√7
11 + 7√7
11 + 9√7
1/10
Solution
Answer:
11 + 7√7
Explanation:
(9 - √7) (2 + √7)
= 9(2) + 9√7 + 2(-√7) + (√7) (-√7)
= 18 + 9√7 - 2√7 - 7
= 11 + 7√7
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