exam Maths Puzzle Numerical Ability

(3xy^4z^-3)^2/(4x^5z^-4)^-1 coming up with 2 answers thanks

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exam Other Question

Solve using the quadratic formula:
x2 - 3x = 7x - 2


x2 - 7x - 1 = -7

both of these need to in solve these 2 I have not been able to get this done.
Math homework. :/

The Ozark Furniture Company can obtain at most 8100 board feet of oak lumber for making round and rectangular tables. The tables must be stored in a warehouse