exam
Maths Puzzle
Numerical Ability
Solve by completing the square:
x^2 - 16x + 63 = 0
I have four answers:
a) -7, 9
b) 7,9
C) 7, -9
D) -7, -9
When I plug in these answers, I do not come up with zero, am I doing something wrong? Thank you for your help!
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