Asked by Ashley
24. Solve the system of equations algebraically. Show all of your steps.
Y = x^2 + 2x and y = 3x + 20. Btw this is a workpad problem. I just need to be put in the right direction, on how to do it.
Y = x^2 + 2x and y = 3x + 20. Btw this is a workpad problem. I just need to be put in the right direction, on how to do it.
Answers
Answered by
bobpursley
set the equations equal (both equal y)
3x+20=x^2+2x
x^2-x-20=0
(x-5)(x+4)=0
solutions at x=5, and x=-4
Now put those solutions into either equation, and you have a x,y set.
y=x^2+2x
(-4,8) and (5,35) are the two solutions.
3x+20=x^2+2x
x^2-x-20=0
(x-5)(x+4)=0
solutions at x=5, and x=-4
Now put those solutions into either equation, and you have a x,y set.
y=x^2+2x
(-4,8) and (5,35) are the two solutions.
Answered by
Ashley
Aww. Thanks Guys! I really appreiciate it.
Answered by
Derp
Wait how did bobpusrsly get x^2-x-20=0
Answered by
our mom
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