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now first thing you need to notice with this function,
is a common factor so you get
now to factor the first quadratic equation, multiply a by c so it is
now what two numbers multiply together to give you -30 yet add together to give you a sum of 13. in this case we use +15 and -2 and we get
you can factor out a 3x from the first bracket and a -2 from the second giving you
is a common factor giving us a result of
now for the second part.
this factors easily enough into
so our factored form is