exam Maths Puzzle Numerical Ability

Factor completely.
49x^2 - 9

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exam Other Question

(x+3)^3 this should be clubed. factor and give result please. i beleve that the book is wrong. it says the answer is x squared plus 6x plus 9. Solve, expressing answer in exact form.
log<3>9 = x^3 - ln(e^-s)