exam Maths Puzzle Numerical Ability

Factor Completely
y^2-x^2+2x-1

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exam Other Question

rationalize the denominator of the fraction.3 sqrt 3 over 3 sqrt 7 i came up with 3 sqrt 147 over 7 but i have no idea if this is correct.thanks in advance for your help .also rewrite 5 sqrt c with a small 2 at the top of the c.for this one i got c 2/5 Graph the function

f(x)- -2x-5

Hint: This is just like the equation y = mx + b