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Algebra is a topic in maths that uses letters to represent numbers. Algebra was "invented" by the Muslim mathematician Al-Khwarizmi in the book he wrote in 820. Algebra is the Arabic word (aljabr) for "equation", and the word "algorithm" comes from the author's name, Al-Khwarizmi. He is known as "the father of Algebra", however many ancient civilizations developed some sort of algebraic methods of solving problems, as far back as the Babylonians (1800 - 1600 BC) Why not have a closer look at "The history of Algebra So why do we have to learn algebra? Well, it teaches us problem solving skills and There are "examples " all around us of things in the everyday world that you could fully understand using only the tools in algebra. In the Junior Cert exam Algebra is examined in question 2 and 3 on paper 1. Some of the Questions you might be asked are: "Substitution " which is when you have to evaluate expressions by replacing letters with values. Simplifying Expressions involves expanding brackets and adding like terms. This "game " will help you understand this section and then you can test yourself using this "quiz "Solving Equations " is when you have to get a value for x as your answer. "Solving Inequalities " is similar to solving equations but these questions will contain the > and < signs. Questions on facorising expressions can be asked a number of different ways, try this quiz to see if you need to revise this topic. You may be asked to form equations based on some information you will be given, try this "site " to help you master this topic. With "Simultaneous equations " you have to find a value for 2 letters, normally x and y. Now that you know all about Algebra why not have a look at some "exam papers
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bhar é ailgéabar sa mhatamaitic ina seasann litreacha d’uimhreacha. Ba é an matamaiticeoir Moslamach, Al-Khwarizmi, a “cheap” ailgéabar sa leabhar a scríobh sé sa bhliain 820. Is é ailgéabar an focal Araibise (aljabar) ar ‘cothromóid’, agus tagann an focal ‘algartam’ ó ainm an údair, Al-Khwarizmi. Tugtar ‘athar an ailgéabair’ air, ach d’fhorbair mórán sibhialtachtaí ársa modhanna ailgéabracha de chineál éigin chun fadhbanna a réiteach, chomh fada siar leis na Bablónaigh (1800-1600 R.Ch.). Caith súil níos géire ar "The history of Algebra én fáth a gcaithimid ailgéabar a fhoghlaim? Múineann sé scileanna réitithe fadhbanna dúinn. Is iomaí "sampla " thart orainn sa saol a d’fhéadfaí a thuiscint ina n-iomláine gan ach na huirlisí san ailgéabar a úsáid. Sa Teastas Sóisearach, déantar scrúdú ar ailgéabar i gCeist 2 agus i gCeist 3 ar Pháipéar 1. Seo a leanas cuid de na Ceisteanna a d’fhéadfaí a chur ort: "Ionadú " – ciallaíonn sé seo nach mór duit sloinn a mheasúnú trí luachanna a chur in ionad litreacha. Is é atá i gceist le ‘Sloinn a Shimpliú’ lúibíní a fhairsingiú agus téarmaí cosúla a chur leis. Cuideoidh an "cluiche " seo leat tuiscint a fháil ar an roinn seo agus is féidir leat triail a chur ort féin ansin sa "quiz " seo. Ciallaíonn "Cothromóidí a Réiteach " nach mór duit luach ar x a fháil mar an freagra. Tá "Éagothromóidí a Réiteach " cosúil le réiteach cothromóidí ach go mbíonn na comharthaí > agus < sna ceisteanna seo. D’fhéadfaí ceisteanna faoi fhachtóiriú slonn a chur ar roinnt bealaí difriúla; bain triail as an quiz seo lena fháil amach an gá duit dul siar ar an ábhar seo. B’fhéidir go n-iarrfaí ort cothromóidí a chumadh bunaithe ar phíosa faisnéise a thabharfar duit; bain triail as an "suíomh " seo mar áis chun sárthuiscint a fháil ar an ábhar seo. Maidir le "Cothromóidí Comhuaineacha " ní mór duit luach a fháil ar dhá litir, x agus y de ghnáth. Ós rud é go bhfuil sáreolas agat ar ailgéabar anois, caith súil ar roinnt "scrúdpháipéar