exam Maths Puzzle Numerical Ability

Solve the following: loga (1/27)=-3. a is the small number next to log.

Read Solution (Total 0)

exam Other Question

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! how do you evaluate this equation step by step: 6!-4!