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05-12-2006, 03:12 PM
can anybody helpme factor down the quadractic eqaution of:

42x^2-9x-15=0

i have to solve for both x's

happy
05-12-2006, 03:19 PM
Some similar examples were done for you. Where are you stuck?

05-12-2006, 03:22 PM
i jsut don't understand how people are getting these answers. on this equation, is this how i do it?:

42x^2-9x-15=0

do i find the greatest common factor and go from there?

(14x-5)(2x+3)

happy
05-12-2006, 03:29 PM
i jsut don't understand how people are getting these answers. on this equation, is this how i do it?:

42x^2-9x-15=0

do i find the greatest common factor and go from there?

(14x-5)(2x+3)

You don't seem to be grasping the concept. Perhaps you need more help than can be provided here.

stapel
05-12-2006, 03:40 PM
i jsut don't understand how people are getting these answers.
When you have been provided with solutions, every step has been shown. If you are still stuck, then you need either to study those worked solutions (since just copying the answers won't help you learn), or else you need to study some generalized lessons to re-learn the basic concepts.

. . . . .Paul's Online Notes: Quadratic Equations (http://tutorial.math.lamar.edu/AllBrowsers/1314/SolveQuadraticEqnsI.asp)

. . . . .WTAMU: Quadratic Equations (http://www.wtamu.edu/academic/anns/mps/math/mathlab/col_algebra/col_alg_tut17_quad.htm)

. . . . .Mathematics Help Central: Methods of Solving Quadratic Equations (http://www.mathematicshelpcentral.com/lecture_notes/intermediate_college_algebra/methods_of_solving_quadratic_equations.htm)

. . . . .Math for Morons Like Us: Solving Quadratic Equations (http://library.thinkquest.org/20991/alg2/quad.html)

. . . . .The Math Page: Quadratic Equations (http://www.themathpage.com/alg/quadratic-equations.htm)

. . . . .Pink Monkey: Methods of Solving Quadratic Equations (http://www.pinkmonkey.com/studyguides/subjects/algebra/chap4/a0404301.asp)

. . . . .Regents Prep: Quadratic Equations (http://www.regentsprep.org//Regents/mathb/mathb-topic.cfm?TopicCode=7D1)

. . . . .Solving Quadratic Equations (http://www.purplemath.com/modules/solvquad.htm)

Once you have studied the various worked examples, please attempt this exercise. If you get stuck, please reply showing all of your steps. Thank you.

Eliz.