exam Maths Puzzle Numerical Ability

log 143640(base70)

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exam Other Question

Need help with this one: Solve by completing the square. Thank you :)

x^2-1/2x-3/16=0

answer choices:
a. -1/4, 3/4
b. -1/4, 2/3
c. -3/4, 1/4
Can you please help me graph this equation?

2x-3y=-6