exam Maths Puzzle Numerical Ability

How do you solve |2x + 6| - 4 = 20, whats the answer?

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exam Other Question

If the graph of y=x^2 is transformed to y=3(2)^(-1/4x-1)+1, what are the coordinates of the new focal point? I think (-4,4)???? Divide

X^4+X^2-80
over
x+3