Word Problem: Two companies working together can clear a parcel of land in 7 hours. Working alone, it would take Company A 6 hours longer to clear the land than it would Company B. How long would it take Company B to clear the parcel of land alone?
This is what I did:
Company A: x+6
Company B: x
Then it asked me to make an equation out of it. My answers we're all wrong, so I gave up and looked for the answer. And this is what they said:
** Can somebody explain to me why the numerators are 1s?
I got this far: x²-8x-42=0
Then, says I have to use the Quadratic Formula.
Tried to solve it but I always end up with a radical.. which is: (8±2√58)/2
and if simplified, would be (?): 4±√58
I re-checked several times but I cannot see what I did wrong..
I appreciate any help.