Friday

March 6, 2015

March 6, 2015

Posted by **jean** on Thursday, July 3, 2008 at 8:55am.

Prove (algebraically, not numerically) that the product of the solutions of

ax^2+bx+c=0 is c/a

- second post algebra -
**Reiny**, Thursday, July 3, 2008 at 9:19amRemember that the quadratic formula gives you the solution

x = (-b √(b^2-4ac))/(2a)

so when we multiply these two solutions we get

(-b+√(b^2-4ac))/(2a) * (-b-√(b^2-4ac))/(2a)

= (b^2 - (b^2-4ac))/(4a^2)

= 4ac/(4a^2)

= c/a

**Answer this Question**

**Related Questions**

algerba - does anyone have a clue how to do this. I am so lost. If you can ...

algebra - Give the equation of the line that passes through point (5, 1) and is ...

algebra - Again I have no clue in figuring out this problem, please help: (3s^4-...

algebra - Again I have no clue in figuring out this problem, please help: (3s^4-...

english - can someone please help me with my previous post...i don't have a clue...

Algebra - 2x -4 = 7x + 9 Don't' have a clue. I tried squaring both sides to ...

CHEMISTRY - 4. The human eye is a complex sensing device for visible light. The ...

Algebra 2 Urgent! please Help! - simplfy (10x^2-6x-x^3)+(9x+x^3+5x^2) please ...

2nd grade math requestion post - Okay, my child is doing problem solving lesson ...

NVQ level 3 buisness admin - ok im really struggling on the questions on unit ...