SOLUTION: If 4x2 -12x+k is a perfect square . Find the numerical value of K.

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Question 1018964: If 4x2 -12x+k is a perfect square . Find the numerical value of K.
Answer by josgarithmetic(39628) About Me  (Show Source):
You can put this solution on YOUR website!
4x%5E2-12x%2Bk
%282x-b%29%282x-b%29
2%2Ax%2A2%2Ax-2bx-2bx%2Bb%5E2
4x%5E2-4bx%2Bb%5E2

Corresponding positions for the expression in the same form:
-4b=-12 and b%5E2=k.

highlight_green%28b=3%29
-
highlight%28k=9%29