General Chat

Top tip - using the Genes Reunited community

Welcome to the Genes Reunited community boards!

  • The Genes Reunited community is made up of millions of people with similar interests. Discover your family history and make life long friends along the way.
  • You will find a close knit but welcoming group of keen genealogists all prepared to offer advice and help to new members.
  • And it's not all serious business. The boards are often a place to relax and be entertained by all kinds of subjects.
  • The Genes community will go out of their way to help you, so don’t be shy about asking for help.

Boards

Quick Search

Single word search

Tools

Findmypast DNA Banner

Icons

  • New posts
  • No new posts
  • Thread closed
  • Stickied, new posts
  • Stickied, no new posts

Help maths homework - there's gonna be tears by be

Login to Add Reply Watch This
ProfilePosted byOptionsPost Date

Bacardi

Bacardi Report 14 Oct 2006 09:41

Many thanks Guys and Gals - unfortunately pc crashed while thanking those that PM'd me so have only just got back on line to thank you all:-) Son still doesn't understand it, but his teacher says correct answer was 3 and 4. Think teacher is going to set him some more to try and help him so as Arnie said ' I'll Be Back' LOL Many thanks Bev X

Rachel

Rachel Report 13 Oct 2006 06:23

Wish I'd seen this last night I love these! once again for good messure if you checking back Xsqu - 7x + 12 = 0 (x-3)(x-4) = 0 either X-3 = 0 or X-4 = 0 so either x = 3 or x = 4 (need to write down both) to check multiply out (x-3)(x-4) = 0 x*x - 3x - 4x +12 = 0 .....( - * - = +) xsquared - 7x +12 = 0

Joe ex Bexleyheath

Joe ex Bexleyheath Report 13 Oct 2006 02:09

This is simple quadratic equation. For sq sign I will use asterisk. x* - 7x +12 = 0 By factorising we find (x-4)(x-3) = 0 (Proof x multipied by x ; x times -3 ; -4 times x ; -4 times -3 = 0 ................. x* ..................-3x................-4x ............+12 =0) From the factorised equation we see x - 4 = 0 OR x-3 = 0 So x = 4 OR x = 3 You can prove the answers by substituting an answer into the original question : so 4* - 7x4 +12 =0 ..................16-28+12 = 0 OR .... 3* - 7x3 + 12 = 0............ 9 - 21 +12 = 0 Your son/dau should not get too flustered with these problems - they may look frightening but aren't. The knack is to find two numbers that multiply to one of the figures and the same two add to make the other : If the n umbers were +14 and -32 then the answers would be .....+16 and -2; If 21 and 10 then 3x7 and 3+7.

Nolls from Harrogate

Nolls from Harrogate Report 13 Oct 2006 00:36

Phew! thanks heavens I'm not at school now.... Norah

Researching:
Gilmour/McSherry/Boyle/Mason/Robertson

.•:*:•.Scouser*NANNA*Lyn.•:*:•.

.•:*:•.Scouser*NANNA*Lyn.•:*:•. Report 13 Oct 2006 00:28

X squared - 7x + 12 = 0 X = 3 So 3 squared = 9 7x = 7 x 3 = 21 9 - 21 = -12 (Negative 12) -12 + 12 = 0 Hope you can understand that! Lyn x x x x

Heather

Heather Report 13 Oct 2006 00:12

x=3 or 4 Seem to remember having divide it into two lots of brackets. (x-3)(x-4) x-3 =0 x=3 x-4=0 x=4 Heather

♥†۩ Carol Paine ۩†♥

♥†۩ Carol Paine ۩†♥ Report 13 Oct 2006 00:01

xsquared -7x+12=0 xsq + 12 = 7x (minus becomes plus when changes sides) xsq = 7x -12 x=4 http://www.(quickmath.)com/ try this site

Bacardi

Bacardi Report 12 Oct 2006 21:37

Any maths genuis work out this equation please and explain how to solve it?? X squared - 7X + 12 = 0. Many thanks