Find the value of k that would make the left side of the eequatios a perfect square trinomial. value of k that would make the left side of the equation a perfect square trinomial.

64x^2-kx+1=0

x^2-kx+16=0

4x^2-kx+9=0

16x^2+kx+9=0

(1/4)x^2-kx+(1/25)=0

the numbers in parenthesis are fractions!!

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