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Please help me! Solve the equation 2x^3+17x^2=-8x?
Solve the equation
2x^3+17x^2=-8x
Can someone please help me with this problem. I have been stuck on it for, literally an hour! And if you can could you please explain hopw to solve it. Thank you so much for your help!
11 Answers
- Anonymous10 years agoFavorite Answer
Bring 8x to the left..
2x³ + 17x² + 8x = 0
Factoring, we obtain:
x(2x² + 17x + 8) = 0
x(2x + 1)(x + 8) = 0
Finally, by zero-product property..
x = 0 and 2x + 1 = 0 and x + 8 = 0
x = {0, -½, -8}
I hope this helps!
Source(s): Knowledge - TCLv 710 years ago
2x^3 + 17x^2 = - 8x
2x^3 + 17x^2 + 8x = 0
x(2x^2 + 17x + 8) = 0
x(2x + 1)(x + 8) = 0
x = 0 or x = - 1/2 or x = - 8
- DavidLv 710 years ago
2x^3 + 17x^2 = -8x
2x^3 + 17x^2 + 8x = 0
x(2x^2 + 17x + 8) = 0
x(2x + 1)(x + 8) = 0
x = {-8, -1/2, 0}
- ?Lv 45 years ago
you may do away with the 8 on the left factor so which you basically have x= something the x is elevated by utilising 8 so which you may do the different of multiplication (branch) to do away with the 8. and you apart from mght could try this to the different factor to maintain the equation equivalent. so which you may divde the two factors by utilising 8. 8x=7 /8 /8 x=7/8 x=0.875
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- 10 years ago
First, divide both sides by x.
2x^2 +17x = -8
2x^2 + 17x +8 = 0
Then, use the quadratic equation to solve for x.
(-17 + sqrt(17^2 - (4)(2)(8)))/((2)(2)) and (-17 - sqrt(17^2 - (4)(2)(8)))/((2)(2))
This will give you both solutions for x
x=-1/2 x=-8
Source(s): an engineering major - 10 years ago
divide both equations by x
you get
2x^2+17x=-8
rearrange
2x^2+17x + 8 = 0
(2x+1)(x+8)
2x = -1
x = -0.5
x = -8
- KristineLv 510 years ago
2x^3+17x^2=-8x
2x³+17x²+8x=0
x(2x²+17x+8)=0
x(2x+1)(x+8)=0
x = 0
2x+1=0
2x= -1
x = -1/2
x+8=0
x = -8
- 10 years ago
dividing both side with 0 cant be done because x may be zero.
ans:{0,8,-1/2}