Question

My sum is -200 and the product is +6000, what two numbers would give me a sum of -200 and a product of +6000?

Answer 1

x + y = -200
x * y = 6000

Answer 2

can you solve that?

Answer 3

nope

Answer 4

how would you factor this then? 0.0025d^2-0.5d+15?

Answer 5

I have no idea what that expression has to do with the problem

Answer 6

you have a system of 2 equations containing 2 unknowns

Answer 7

You should learn how to solve this

Answer 8

do you know how to solve any system of equations? if not do you even know what it is?

Answer 9

I want to factor that so I could find the roots

Answer 10

@gerba Divide each term of this: 0.0025d^2-0.5d+15 = 0 by .0025 to get d^2 - 200d + 6000 = 0 and proceed from there.

I think you may have a sign error on the -.5d.

c + d = -200 --> c = -200 - d

cd = 6000
(-200 - d)*d = 6000
-200d - d^2 = 6000
-d^2 - 200d = 6000
d^2 + 200d = -6000
d^2 + 200d + 6000 = 0

Answer 11

Suggestion: Complete the square or use the Quadratic Formula to solve for d.