Question

Find two numbers whose product is -21, and whose sum is -4.

Answer 1

Well, a negative and a positive is a negative....

Answer 2

xy=-21,x+y=-4, x+(-21/x)=-4, x^2+4x-21=0, (x-3)(x+7)=0, x=3 or x = -7,
solved

Answer 3

7 and 3 added are not 4 tho

Answer 4

7 and 3 would be 10 not 4

Answer 5

i know so what do i do?

Answer 6

Well, 21 can't go into 4 so you would probably have to use exponents or add/subtract

Answer 7

do whats the answeR?

Answer 8

Figure it out. :) If I could I would help you but I'm doing math homework right now and its getting late. Just try to figure out what plus or minus 4 gets you 21 as an answer.