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maksim [4K]
3 years ago
8

How do you factor when "a" is greater than 1? Pls show work

Mathematics
1 answer:
aliya0001 [1]3 years ago
6 0
For ax^2+bx+c
if a≠1 then
first seee if you can undsitribute a
ifyou can't
use the ac method

multiply a and c
find 2 numbers that add to b and multiply to get ac
split b into that
group
undistribute
undistribute


so

4x^2-7x-15
ac=4*-15=-60
what 2 numbers multiply to get -60 and add to get -7?
5 and -12
split b up into -12 and 5
4x^2-12x+5x-15
group
(4x^2-12x)+(5x-15)
undistribute
4x(x-3)+5(x-3)
undistribute
(4x+5)(x-3)
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