what will i substitute? let z^2 = x + 4 x = z^2 - 4 dx = 2zdz but its no use i will get a result of need help pls
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Originally Posted by ^_^Engineer_Adam^_^ what will i substitute? let z^2 = x + 4 x = z^2 - 4 dx = 2zdz but its no use i will get a result of need help pls Start by rationalizing the denominator of the integrand: Now split the integrand into two terms and see what you can do with it. -Dan
got it now thanks ts!
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