exam Maths Puzzle Numerical Ability

Solve using the quadratic formula please:

x^2-3x-23=5

Please provide step by step instructions to help me understand.
Thanks!
C

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exam Other Question
Simplify:

12/(x+h+15) minus 12/(x+15) all divided by h i dont know how to mulitply or change the sign when we do inequalities.thanks

jg



Justene Garcia