Rationalise the denominator 10/√7-√5
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Answered by
2
Step-by-step explanation:
√
10
7
=
√
10
√
7
To rationalise this denominatir, we multiply the top and bottom by
√
7
, so we get
√
10
√
7
⋅
√
7
√
7
,
√
7
⋅
√
7
is just
7
, and
√
10
⋅
√
7
=
√
10
⋅
7
=
√
70
, as
70
doesn't have any factors which are perfect squares, it can only stay as
√
70
, giving us
√
70
7
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