Quadractic equations

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May 2010
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Hello everyone, I need help with one more question and that's using the quadractic formula to solve 16x2 + 96x + 128 = 0 and -4x2 + 28x – 48 = 0. Could someone tell me the answer to both so I can hurry and submit the assignment, I've been really waiting to see what I get on this.
 

pickslides

MHF Helper
Sep 2008
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But if we solve these equations for your assignment it wont be your work.

I suggest studying this, for \(\displaystyle ax^2+bx+c=0\) then \(\displaystyle x=\frac{-b\pm\sqrt{b^2-4ac}}{2a}\)

It will give you the answer.
 
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May 2010
43
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But if we solve these equations for your assignment it wont be your work.

I suggest studying this, for \(\displaystyle ax^2+bx+c=0\) then \(\displaystyle x=\frac{-b\pm\sqrt{b^2-4ac}}{2a}\)

It will give you the answer.
I know, I've been studying this formula and I have been getting all kinds of things, that's why I posted the question.
 

skeeter

MHF Helper
Jun 2008
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North Texas
Hello everyone, I need help with one more question and that's using the quadractic formula to solve 16x2 + 96x + 128 = 0 and -4x2 + 28x – 48 = 0. Could someone tell me the answer to both so I can hurry and submit the assignment, I've been really waiting to see what I get on this.
\(\displaystyle 16x^2 + 96x + 128 = 0\)

divide every term by 16 ....

\(\displaystyle x^2 + 6x + 8 = 0\)

this is a factorable quadratic ... do it.

---------------------------------------

\(\displaystyle -4x^2 + 28x - 48 = 0\)

start by dividing every term by -4 ... same song, second verse.
 
May 2010
43
7
Break down the first term:
\(\displaystyle 16x^2\) compared to \(\displaystyle ax^2\)

Do you see to what the "a" term may be equal?
 

mr fantastic

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Dec 2007
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Hello everyone, I need help with one more question and that's using the quadractic formula to solve 16x2 + 96x + 128 = 0 and -4x2 + 28x – 48 = 0. Could someone tell me the answer to both so I can hurry and submit the assignment, I've been really waiting to see what I get on this.
Assignments usually count towards a student's final grade. MHF policy is to not knowingly help with such questions - it's meant to be the work of the student, not the work ofothers.

Thread closed (you can discuss this with me via pm if you want).
 
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