What two numbers add up to -14 and multiply out to -240
2 answers:
So x+y=-14
xy=-240
x+y=-14
subtract y from both sides
x=-14-y
subsitute for x in second equation
(-14-y)y=-240
multiply
-y^2-14y=-240
add y^2+14y to both sides
0=y^2+14y-240
use quadratic equation to solve which is
if you have ax^2+bx+c so
a=1
b=14
c=-240
subsitute and get
(+/- means that there are 2 equations exg 2+/-8=2+8 and 2-8)
the numbers are 10 and -24
xy=-240
x+y=-14
subtract y from both sides
x=-14-y
subsitute for x in second equation
(-14-y)y=-240
multiply
-y^2-14y=-240
add y^2+14y to both sides
0=y^2+14y-240
use quadratic equation to solve which is
a=1
b=14
c=-240
subsitute and get
the numbers are 10 and -24
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