if x=2/√3-√5and y=2/√3+√5,then x+y
Answers
Answered by
2
Step-by-step explanation:
We know that,
(x + y)(x - y) = x² - y²
Therefore,
- 144√5 is the answer.
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Answered by
2
Answer:
2−
5
2+
5
=
2−
5
2+
5
×
2+
5
2+
5
=
2 2
5
) 2
(2+
5
) 2
=
4−5
4+4
5
+5
=
−1
9+4
5
=−9−4
5
(−9−4
5
) 2
5
) 2
=81+72
5
+80−(81−72
5
+80)
=81+72
5
+80−81+72
5
−80
=144
5
=
2+
2−
=
=
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