102k views
0 votes
What can be multiplied to get -16 and add up to get -14

User Kimsagro
by
8.0k points

1 Answer

4 votes
so
assuming you mean what 2 number multiply to get -16 and add to get -14
xy=-16
x+y=-14
subtract x
y=-14-x
subsitute -14-x for y
x(-14-x)=-16
-14x-x^2=-16
add 14x to both sides
-x^2=14x-16
add x^2 to both sides
x^2+14x-16=0
use quadratic formula

formula is used to solve for x when you have ax^2+bx+c so if you have them then you subsitute them into this equation:
(-b+ √(b^2-4ac) )/(2a) or
(-b- √(b^2-4ac) )/(2a)

so
a=1
b=14
c=-16
if you subsitute you will get
-15.062257748299 and 1.0622577482985
really close

User Recek
by
8.9k points

No related questions found

Welcome to QAmmunity.org, where you can ask questions and receive answers from other members of our community.

9.4m questions

12.2m answers

Categories