book Maths Puzzle Numerical Ability

slove by factoring: x squared = 4x + 12

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I need to know if I have this question right or not, In the ordered pair(12,-7) ? Is the the abscissa 12 and the ordinate -7? Please tell me if I am right or not, please. A man left one-fourth of his estate to his wife, one-fifth to each of his two sons, one-eighth to his daughter and the remainder, an amount P32,000 to charity. Find the amount of the estate.