exam Maths Puzzle Numerical Ability

How do I complete the square to find the vertex form of the following equation:

-2x^2 - 6x + 7

Thank you very much.

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exam Other Question
Copy & complete the statement.
1.) A(N)( your answer) is a ratio whose denominator is 100.







Thanks! If you can can you please work fast! Thanks for all your help!Hav Solve the system by addition

x+y=1
x-y=3