Solving a quadratic by factorisation

This is not a general method, but works if the quadratic expression can be factorised.

So, first put your quadratic into standard form, with 0 for the right hand side. Now try to factorise the left hand side using the techniques here.

The solution follows almost immediate by observing that if you have an expression formed from a number of factors, and the expression = 0, then at least one of these factors must be 0.

For example, solve -mathformula not MarkupType-
Fatal error: Uncaught Error: Call to undefined method mathformula::makeTypeDef() in /var/www/vhosts/ent.storkey.uk/html/inc/reporting2.php:365 Stack trace: #0 /var/www/vhosts/ent.storkey.uk/html/inc/dynaPage.php(189): echo_value('quadfactsolv', 'content', Array) #1 /var/www/vhosts/ent.storkey.uk/html/inc/dynaPage.php(742): dynaPage->echo_value('content') #2 /var/www/vhosts/ent.storkey.uk/html/inc/dynaPage.php(179): mainPanel->write('main-panel') #3 /var/www/vhosts/ent.storkey.uk/html/index.php(21): dynaPage->write() #4 {main} thrown in /var/www/vhosts/ent.storkey.uk/html/inc/reporting2.php on line 365