exam Maths Puzzle Numerical Ability

Simplify the rational expression:
x2 � 6x � 7
----------------
x2 � 1

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exam Other Question

Having some real difficulty with this bad boy, any help would be really appreciated.
By equating real and imaginary parts, find expressions for R6 and L in terms of R1, R2, R3, R4 The perimeter of a rectangle is 108 inches. The length exceeds the width by 8 inches. Find the length and the width.
Again please help me.