*



You are watching: An equation that is true for every value

Truth worths of Equations centregalilee.com Topical summary | Algebra 1 summary | MathBits" Teacher sources Terms of Use contact Person: Donna Roberts
*

An algebraic equation is a statement of equality between two quantities or algebraic expressions.

Most algebraic equations are TRUE when specific values room substituted for the change (such as x), and also are FALSE because that all other values. The values that make equations TRUE are called "solutions". over there are, however, "unique" equations that are constantly TRUE or constantly FALSE, no matter what values are subsituted.


*

Equations that are TRUE under details conditions:
These room the majority of algebraic equations. take into consideration x - 1 = 9. This equation has actually one solution (that makes the equation TRUE) as soon as x = 10, because 10 - 1 = 9 is true. For all various other values that x, the equation is FALSE. Together equations deserve to be described as conditional equations due to the fact that they space TRUE just under certain conditions. For all various other values, this equations will be FALSE.


Remember: A direct equation (of level one) has actually only one worth as that solution. <x + 1 = 6 has actually one solution, x = 5> A quadratic equation (of degree two) has actually two worths as the solutions. <x2 = 16 has two solutions, x = 4 and x = -4>
Equations the are always TRUE:
take into consideration x + 7 = 7 + x. This equation has an infinite number of solutions. Any value you pick for x will certainly make the equation a TRUE statement. This kind of equation is dubbed an identity, and the solution collection is all genuine numbers. A couple of other examples:
4(x - 1) = 4x - 4 x + x = 2x(x + 3)(x - 3) = x2 - 9 Equations that room identities often tend to it is in statements entailing "properties" or "rules", such together a property of the real numbers (commutative property, distributive property, etc.), one arithmetic procedure on the variable (addition, subtraction, etc), a dominance for factoring, and so on. Both political parties of the equation represent the same algebraic expression, just written in a different manner.


If you solve an equation and you end up with an noticeable identity, such as 5 = 5, you"ll understand that the orginal equation is also an identity,with one infinite number of solutions.
Equations the are constantly FALSE:
consider x + 7 = x. This equation has actually no solutions. No issue what value you select for x, the equation will certainly be a FALSE statement. Such statements have the right to be described as contradictions.



See more: C A Pause Or Break In A Line Of Verse, Please Wait

If you deal with an equation and you finish up through an obvious contradiction,such as 1 = 2, you"ll understand that the orginal equation is additionally a contradictionand has actually no solutions.

Topical synopsis | Algebra 1 overview | centregalilee.com | MathBits" Teacher sources Terms that Use contact Person: Donna Roberts