Maths, integration help
Favorites|Homepage
Subscriptions | sitemap
HOME > > Maths, integration help

Maths, integration help

[From: ] [author: ] [Date: 11-11-26] [Hit: ]
......
∫(2x+3^)^2dx
second step is below:
=∫(4x^2+12x+9)dx <---- where does the '12x' come from? :ss

by '^2' i mean squared

-
its just that they've expanded the equation!

(a+b)² = (a² + 2ab + b²)

like here, (2x + 3)² = ( (2x)² + (2*2x*3) + (3)²)


= (4x² + 12x + 9)


∫ 4x² + 12x + 9 dx

= (4/3)x³ + 6x² + 9x + c (the c is because you dont have limits) (to integrate, you add 1 to the power of x and you divide by the power, that is, 4 divide by 3 and 12 divide by 2 gives you 6 )

-
can u revisit your question please

-
it came from 2(2x)(3) = 12x
1
keywords: Maths,help,integration,Maths, integration help
New
Hot
© 2008-2010 http://www.science-mathematics.com . Program by zplan cms. Theme by wukong .