Two Differences
to a Sum

     Two positive numbers are such that their difference is 7 and the difference of their squares is 105. What is their sum?

Your task:

  1. Show your kid brother (or sister) what this means by solving it in an arithmetical manner. Be patient.

  2. Show your parents how much you've learned in Algebra 1 this year by solving it with basic algebra. This means, just demonstrate what the sum is, without determining what the two numbers are.


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