if a=5+√2 then find -7/a
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Answered by
1
-7/5+(2)×5-(2)/5-(2)
-35+7(2)/25-2
-35+7(2)/23
7 (2)-35/23
()=root
-35+7(2)/25-2
-35+7(2)/23
7 (2)-35/23
()=root
aasil2003:
u r wrong dude
ya sorry I found my mistake now
no problem crct it
hmn
☺️
Answered by
1
a = 5 + √2
-7/a = -7/(5+√2)
Rationalising factor = 5 - √2
→ = -7(5-√2)/(5+√2)(5-√2)
= (-35+7√2)/(5²-√2²)
= (7√2-35)/(25-2)
= (7√2-35)/23
Hope it helps
-7/a = -7/(5+√2)
Rationalising factor = 5 - √2
→ = -7(5-√2)/(5+√2)(5-√2)
= (-35+7√2)/(5²-√2²)
= (7√2-35)/(25-2)
= (7√2-35)/23
Hope it helps
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