1.Multiply (d-5)^2
2.Multiply (2x^2)(X+4)(x-4)
3.Solve the equation x^2+5x-4=0 using the quadratic formula.
4.Solve the equation 3m^2+6m=3 using the quadratic formula.
2006-08-24 16:51:04 · 8 answers · asked by joe j 1 in Education & Reference ➔ Homework Help
You can do these yourself - I know its sometimes confusing, but it's really not that hard.
Just remember FOIL and the quadratic formula.
Commit those to memory.
After that, it's just "plug and chug".
2006-08-24 17:01:42 · answer #1 · answered by Mitch 7 · 0⤊ 0⤋
I won't write the answers, but I'll give a few hints:
1) Write out (d-5)(d-5) and use the distributive property to multiply out everything, then cancel like terms.
2) Similar to #1, but an additional hint is (a+b)(a-b) = (a^2)-(b^2)
3) Look up the quadratic formula then just plug in the numbers. Alternatively, if you have a graphing calculator you can type in the equation and see where it intersects the x-axis.
4) Similar to #3, but subtract 3 from both sides so you have one side equal to zero, then you can even factor out 3 from both sides and solve.
2006-08-24 23:59:53 · answer #2 · answered by crystalrabbit7 2 · 1⤊ 0⤋
1. Separate it into (d-5)(d-5)...use Foil...you should get d^2-5d-5d+25...this simplifies into d^2-10d+25. If you don't know what FOIL is: First, Outer, Inner, Last.
2.multiply the first two equations first...this gives you (2x^3+8x^2). Multiply this by the final equation giving you 2x^4+32x^2
3. and 4. I usually use my TI-83 calculator to do these calculations...wish I could help.
2006-08-25 00:18:41 · answer #3 · answered by dway2003_lh 2 · 0⤊ 0⤋
I'll tell ya the quadratic formula.
-B plus or minus the square root of (B squared - 4 AC) all over 2A.
A is the coefficient of x^2
B is the coefficient of x
C is the constant.
Sorry our characters are so limited it's hard to write.
_________
-b +/- \/ b^2 - 4AC
2A
2006-08-25 00:22:19 · answer #4 · answered by goodlittlegirl11 4 · 0⤊ 0⤋
1. (d-5)(d-5)
2. .... now im lost after that. i even forgot what the quadratic formula is... and god r u going to get ur whole hw paper done on yahoo answers? tisk-tisk
2006-08-24 23:56:42 · answer #5 · answered by Quin 2 · 0⤊ 0⤋
Well I would help you out but it has been almost 14 years since I have had a math class. sorry
2006-08-24 23:58:02 · answer #6 · answered by blessedfriend2000 3 · 0⤊ 0⤋
http://www.webmath.com/index4.html
2006-08-25 00:03:40 · answer #7 · answered by uh yeah 2 · 0⤊ 0⤋
what?
2006-08-24 23:57:00 · answer #8 · answered by Caroline D. 2 · 0⤊ 0⤋