[(√5-2)]/(√5+2)]-[(√5+2)/(√5-2)]
swaralishete:
please ans it ugently
Answers
Answered by
63
so, here it is..
[(√5-2)/(√5+2)]-[(√5+2)/(√5-2)]
=[(√5-2)/(√5+2)*(√5-2)/(√5-2)]-[(√5+2)/(√5-2)*(√5+2)/(√5+2)]
multiplied (√5+2) & (√5-2) both sides
=[(√5-2)²/5-4]-[(√5+2)²/5-4]
=[5-4√5+4]-[5+4√5+4]
=5-4√5+4-5-4√5-4
=-8√5
Hope it helped. ^_^
[(√5-2)/(√5+2)]-[(√5+2)/(√5-2)]
=[(√5-2)/(√5+2)*(√5-2)/(√5-2)]-[(√5+2)/(√5-2)*(√5+2)/(√5+2)]
multiplied (√5+2) & (√5-2) both sides
=[(√5-2)²/5-4]-[(√5+2)²/5-4]
=[5-4√5+4]-[5+4√5+4]
=5-4√5+4-5-4√5-4
=-8√5
Hope it helped. ^_^
Answered by
7
we can do like this also,{(√5-2)/(√5+2)-{(√5+2)/(√5-2)} sqaring on both sides to(√5+2)and (√5+2) {(√5-2)/(√5+2)}²-{(√5+2)²/(√5-2) {(√5-2)/(5+4)}-{(5+4)/(√5-2)} now squaring on both sides (√5-2) and (√5-2) {(√5-2)²/(9)}-{(9)/(√5-2)²} {(5-4)/(9)}-{(9)/(5-4) (1/9)-(9/1)=1/9-9/1=1-81/9=80/9=8.8888888888888888...................................
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