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JAMB Mathematics 2019 Paper
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© africaexams.com
Question : 63
Total: 73
Find the value of k in the equation:
√
28
+
√
112
−
√
k
=
√
175
√
28
7
28
√
7
Validate
Solution:
√
28
+
√
112
−
√
k
=
√
175
√
4
×
7
+
√
16
×
7
−
√
k
=
√
25
×
7
2
√
7
+
4
√
7
−
√
k
=
5
√
7
6
√
7
−
5
√
7
=
√
k
√
k
=
√
7
implies
k
=
7
© africaexams.com
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