Question 83144
Replaced the "?" with "__" to clear the syntax error
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They want you to find the 3rd term, which will make it a perfect square:
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To do this, take the coefficient of x (which is 10), take half of that (5) and
square it, gives us 25
{{{x^2 +10x + __}}}
The third term is 25
{{{x^2 +10x + 25}}} 
Check: (x+5)^2; if you FOIL (x+5)(x+5) you get {{{x^2 +10x + 25}}}
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{{{x^2 -3x + ___}}}
Follow the procedure as stated on the 1st problem:
half of -3 = -1.5; (-1.5)^2 = 
{{{x^2 -3x + 2.25}}}
Check: (x-1.5)^2; if you FOIL (x-1.5)(x-1.5) = {{{x^2 -3x + 2.25}}}
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