Find Factors and Solve Cubic Equations in Less Than ONE Minute! - Leading Coefficient Is Not One

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Автор

Wonderful trick! An amazing teacher, thank you for sharing this trick!

Abby-hisf
Автор

If 5 + 3 = 8 and -9 + 1 = -8, does that imply that X = 1 is a solution in all cases? That is, if A+C=-(B+D), is x = 1 always a solution? In other words as long as A + C = +-(B + D), then X = 1 is a solution.

humester
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What if that 13 over 7 is 5 over 3 and 1over7 is 2 over 3 how will u find ur factors

oluebubesunday
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You should explain more carefully why you "change the sign" when you list the solution set. The reason is that the product of these factors is equal to zero. That means one or all of these factors are zero. Therefore you set each factor equal to zero and when you solve for the variable the constant term is subtracted from both sides and that is why the sign changes.

kennethstevenson