book Maths Puzzle Numerical Ability

Solve by completing the square.

2x^2 - 3x = 1

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book Other Question

I am supposed to solve for x by graphing solution on a number line:

1/3 (absolute value vertical line) 2x-1 (absolute value vertical line) (greater than/equal to symbol) 4 How do I solve this: -a/8=-7