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The sum of two numbers a and b is 20. Write an expression for the sum of their squares, in terms of a.

 Mar 7, 2021
 #1
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a + b = 20      or     b = 20-a

 

a^2   + (20-a)^2 = sum of squares in terms of 'a'

a^2      + a^2 -40a+400

2a^2 -40a+400 = sum of squares

 Mar 7, 2021

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