exam Maths Puzzle Numerical Ability

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.

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exam Other Question

Can someone help me on this?

I need to find the reciptrocal of (-1/5)(15)

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