7+√5/7-√5 - 7-√5/7+√5 = a-7/11 √5
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Answered by
4
Answer:
√5b.
Step-by-step explanation:
Answered by
0
42
=> 7+√5/7-√5 - 7-√5/7+√5 = a-7/11√5
=> (7+√5)² - (7-√5)²/(7-√5)×(7+√5) = a-7/11√5
=> 4×7√5/49-5= a-7 /11√5
=> 4×7√5/44= a-7/11√5
=>7√5/11= a-7/11√5
=>35=a-7
[ a=42]
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