how do you factorise quadratics
how do you factorise quadratics

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quadratic
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x2 ** * ** * **** *** numbers which add up
** * and ******** to **** ** These ******* are * *** 5 (x * ** (x  **
*
Now
**** *** ***** * ** **** when *****
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***
********** ******** *** ****** is **** ***** ****** (x * ** * or ** * 5) *
So
*
* * ** x * 5 *** *** ***** ***** ******* ** *************
4
*** * ** to *** ********** *** 9x
*
***
************ * gives: ** * * ******* 4 * ** = **  36
*
**
* Substituting * gives:
**
 * ×
5
* ** * ** * ** + 20 = ******** ***** 3 simple ***** ***
***
**** be able
to
solve ********* ********** *** *** this ********