Question

What multiplies to 16 and adds to negative 12

Answer 1

8 times 2 8 because they are both equability right 

Answer 2

factor 16 and see the - factor pairs and add them, see which add to -12
-1-16=-17 nope
-2-8=-10 nope
-4-4=-8
hmm


we will solve with math
xy=16
x+y=-12
minus x both sides
y=-12-x
sub for y in other equation
x(-12-x)=16
-12x-x^2=16
add 12x+x^2 both sides
0=x^2+12x+16
use quadratic formula
if you have
ax^2+bx+c=0
x=
`\frac{-b+/- \sqrt{b^(2)-4ac} }{2a}`


0=x^2+12x+16
a=1
b=12
c=16

x=
`\frac{-12+/- \sqrt{12^(2)-4(1)(16) }}{2(1)}`
x=
`(-12+/- √(144-64 ))/(2)`
x=
`(-12+/- √(80))/(2)`
x=
`(-12+/- 4√(5))/(2)`
x=

x=
or


aprox
x=-1.52786 or -10.4721

those are the numbers

the numbes are -1.52786 or -10.4721