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Use integration by parts

let u=ln(x)

let dv/dx=x

therefore du/dx=1/x and v=(1/2)x^2

therefore the integral of xln(x) is equal to the following:

(1/2)x^2ln(x) - (integral...

4x + 7 = 27 4x = 20 x = 5

36x^2 + 4

1. Take the third person plural of the verb in the preterite tense: Estar - estuvieron 

2. remove the 'on' - estuvier

3. Add 'a' on the end to form the first person si...

Both the preterite and imperfect tenses are past tenses in Spanish but they are used in separate ways.

Imperfect Tense

1. Habitual actions 

2. "ing" e.g I was...