exam Maths Puzzle Numerical Ability

solve the following equation by completeing the square

x2+3x=5

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exam Other Question

The best base to determine the solution to 2^2x + 1 = 4^x is:
@ Since 4 is a multiple power of 2, 2 is the best base.
a. b = 10
b. b = 2
c. b = e
d. None of the above, there is no solution to the problem Is this equation a linear equation?

3d - 4f = 8