exam Maths Puzzle Numerical Ability

((a+b)^2)-((a-c)^2) solve to the least common factor.

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exam Other Question

graph the given function
f(x)=-2x-5

please show detailed work so i understand it thank you so much
Perform the indicated division. Rationalize the denominator if necessary. Then simplify each radical expression.

6-sqrt(20) divided by 2