exam Maths Puzzle Numerical Ability

Solve using the square root property:
(x + 6)^2 = 4

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exam Other Question

What is the image of x^2+y^2=1 under the mapping rule (x,y)> (3x+2,3y-5)? I got [1/3(x-2)]^2+[1/3(y+5)]^2=1 ????? I NEED HELP!!!!!!!!!
I need to know...when given a t-table, can a formula be found to determine the coefficient and the degree of a binomail when one trem is a constant?