Question 103342
{{{2c^2+2c-60=2(c^2+c-30)}}}

we produced a constant term {{{-30}}} and a linear coefficient of 1.
That means we should find a pair of factors of -30 that has a sum of 1.

after few trials, you will find the pair to be 6 and -5.

Therefore, the polynomial factors to {{{2(c+6)(c-5)}}}