exam Maths Puzzle Numerical Ability

please help solve for x the problem is log(little x)32 = 5

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exam Other Question

If f(x) = 4x - 3, find the following:

f(-1)

Can you show me how to figure this, I do not understand.

Thank you.
how do I solve the following formula:

4X Squared + 70X = -150

thank you