exam Maths Puzzle Numerical Ability

Factor completely:
x^2 + 9x + 8

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exam Other Question

(4x-1/2)(4x+1/2) I am stuck on this one. Find the domain of this function:
cube root of -4+2x
The function is defined on the interval from to . Use INF for infinity or -INF for minus infinity.

Now find the do