exam Maths Puzzle Numerical Ability

Find the factor the sum of two cubes:
x^3+8

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exam Other Question

Twice the square of a positive integer is 12 more than 10 times that integer. What is the integer?

10(x)^2 = x + 12

I know I have to have a formula first. Am I on the right track for the formula in order to solve this problem? lesie is 4 years older than john. the sum of their ages is 32. How old is Leslie? How old is John?