Answer:
1. x²+x - 20
find a factor of -20 that has the sum of the
value of the middle term which is 1
factors: 5 and -4
(x+5)(x-4)
x²-7x+12
look for a factor of 12 that has the sum of the
value of the middle terms which is -7
factors: -3 and -4 (add them and u'll get the
value the same as the value of the middle
term's coefficient.
(x-3)(x-4)
2. x+1 is already in lowest term.
x²-1 ---> this expression is called the difference
of two squares.
just simply square the first term then square
the last term.
(x-1) ---> parter up with the same face but
different sign, we'll use a plus sign.
(x-1)(x+1)
x²-9 ---> same process, square the first and
the last term.
(x-3)(x+3)
i can't compute the remaining expressions,
'di ko magets ang pagkasulat.
