exam Maths Puzzle Numerical Ability

Factor completely.
49x^2 - 9

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exam Other Question

Please help w/ the following:
Find all the real and complex zeros of the polynomial x^4+8x^3+8x^2-72x-153.
Thank you. A palimdrome is a number whose value is unchanged when its digits are reversed. How many palimdromes are there which are greater than 10 and less than 800?