7+3√5/7-3√5 solve step by step
Answers
Answered by
1
Answer:
The answer is 4
Step-by-step explanation:
The result is
4
.
Explanation:
=
(
7
+
3
√
5
)
(
7
−
3
√
5
)
=
7
2
−
7
⋅
3
√
5
+
7
⋅
3
√
5
−
(
3
√
5
)
2
=
49
−
21
√
5
+
21
√
5
−
3
2
√
5
2
=
49
−
21
√
5
+
21
√
5
−
9
⋅
5
=
49
−
45
=
4
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