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 Jul21 comment Linear Algebra: different determinant answers @ Zev: I believe there is no reason to go through using the quadratic formula when this problem has perfect factors. Being, $(\rm x+1)(\rm x+4)=0$. Jul21 revised Linear Algebra: different determinant answers edited tags Jul21 suggested approved edit on Linear Algebra: different determinant answers Jul21 revised Linear Algebra: different determinant answers edited tags Jul21 answered Laplace transform and Differentiation help Jul21 comment Help with a derivative @Ben: You can disregard the first fraction as a constant multiple and the second fraction you can use the power rule after doing some simplifying. Jul20 suggested rejected edit on Laplace transform and Differentiation help Jul20 revised Solution to 2nd order PDE edited tags Jul20 comment Laplace transform and Differentiation help @ Shai: Great job. Just have one problem following along of where the -$3$ came from on the second fraction $\mapsto$ $-3\dfrac{2}{(s-1)^2+2^2}$. Jul20 comment Laplace transform and Differentiation help @IAmBrianDawkins: You forgot to put a $ at the end of your equation to properly display your$\TeX$input. Jul19 revised Non-separable linear PDE edited tags Jul19 revised Characteristics for 2nd order differential equations edited tags Jul19 answered Second Order DE's Jul19 comment Problem solving a couple of ODEs @Gerry: Okay I see, I did not even read the question. I just read the answers provided first then comments then the question. Jul18 suggested rejected edit on integration by partial fraction Jul18 revised Problem solving a couple of ODEs edited tags Jul18 comment Problem solving a couple of ODEs @Collman: Hint: Look at this form we have:$\frac{\mathrm{d}x}{\mathrm{d}y}+P(y)x=Q(y)\$. Does something stick out what should be our integrating factor? Jul11 awarded Organizer Jul11 revised Transformation and Matrices - Points and Vectors edited tags Jul11 revised Conformability and Matrix Derivatives edited tags