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Algebra 2

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Find the value of c that makes the expression a perfect square trinomial. Then write the expression as the square of a binomial. I didn't really understand what that meant.

x^2-23x+c
x^2-(2/7)x+c

  • Algebra 2 - ,

    take half the middle term coefficient, square it

    x^2 - 23x + 526/4

    = (x- 23/2)^2

    looks like you learning the process of "completing the square"

    here is an easier one ...

    x^2 + 10x + c
    or
    x^2 + 10x + 25 ,,,,,(half of 10 is 5, 5^2 = 25)
    = (x+5)^2

    expand (x+5)^2 to see why this happens

    Now try your own second question and let me know what you got for c .

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