Question: What is the characteristic equation for the second - order homogeneous differential equation 9 y ' ' + 1 2 y ' - 2 6

What is the characteristic equation for the second-order homogeneous differential equation 9y''+12y'-26y=0?
9r3-14r2=0
9r2+12r-26=0
9r3+12r2-26r=0
9r2-14r=0
What is the characteristic equation for the

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