exam Maths Puzzle Numerical Ability

a)Write the general quadratic equation._________________
b) the Quotient Rule for Square Roots stares:_____________________
c)circle the correct answer: simplifying a radical pro

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exam Other Question
-3(-x+4) = 3x-12

I tried distributing the first expression:

3x - 12 = 3x - 12

then add 12 to both sides:

3x = 3x

then divide each side by 3:

x = x

is this possible?
 Find the exact value of:
4csc(3pi/4)-cot(-pi/4)