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Maths Puzzle
Numerical Ability
solve.
b^2 -12b+32=0
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book Other Question
A fisherman takes his boat out to sea and then back to the harbor. The entire trip lasts 8 hours. If he travels out at 18 mph and follows the same route back at 14 mph, how many miles does he travel altogether?
If f(x)=2x^2-5x-3, then f(-3)=
A)0
B)30
C)18
D)48
Please show me step by step how this works