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JAMB Mathematics 2017 Paper
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© africaexams.com
Question : 20
Total: 44
Simplify 4
√
27
+ 5
√
12
− 3
√
75
7
− 7
− 7
√
3
7
√
3
Validate
Solution:
4
√
27
+ 5
√
12
− 3
√
75
= 4
√
3
× 9 + 5
√
3
× 4 − 3
√
3
× 25
= 4 × 3
√
3
+ 5 × 2
√
3
− 3 × 5
√
3
= 12
√
3
+ 10
√
3
− 15
√
3
= (12 + 10 − 15)
√
3
= 7
√
3
© africaexams.com
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