exam Maths Puzzle Numerical Ability

Can someone help me solve this equation please?

9x^2=14

Thank you.

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exam Other Question

2 - 1
7a to the 4th 14a
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3 + 2
5a the 2nd 15a If a unique solution does not exist,how will I know if the system is inconsistent or dependent? How do I solve the following system?

5x+2y=30

x-4y=17