Solve xy + 2xy-2xy 20y (x+ 1) ex. sol. by 0 method, we get [e(e 1) + 20 20]y = (x +1)p [e+0 20]y = (x+ 1) (5)(0- 4)y (x + 1) cf c,xx +cx 1 pl and (+0-20)x+1) 1

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