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QUESTION

how do you factorise quadratics

how do you factorise quadratics

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ANSWER

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********

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*** ********* *** ** * ** * ********* *****

*********

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quadratic

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x2- ** * ** * **** *** numbers which add up

** * and ******** to **** ** These ******* are * *** 5 (x * ** (x - **

*

Now

**** *** ***** * ** **** when *****

********

***

********** ******** *** ****** is **** ***** ****** (x * ** * or ** * 5) *

So

*

* * ** x * 5 *** *** ***** ***** ******* ** *************

4

*** * ** to *** ********** *** 9x

*

***

************ * gives: ** * * ******* 4 * ** = ** - 36

*

**

* Substituting * gives:

**

- * ×

5

* ** * ** * ** + 20 = ******** ***** 3 simple ***** ***

***

**** be able

to

solve ********* ********** *** *** this ********

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