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Introduction to Solving Linear Equations
Introduction to Solving Linear Equations — from OpenStax Prealgebra 2e.
Introduction to Solving Linear Equations
Teetering high above the floor, this amazing mobile remains aloft thanks to its carefully balanced mass. Any shift in either direction could cause the mobile to become lopsided, or even crash downward. In this chapter, we will solve equations by keeping quantities on both sides of an equal sign in perfect balance.
Nå har du Ingen kalkulator setter opp denne, men brikkene kan brukes. Prøv en nedenfor eller skriv inn din egen.
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Trykk på et symbol for den fulle definisjonen, et bilde og hva hver bokstav i det betyr.
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What does it mean to solve an equation?
To find every value of the unknown that makes both sides equal. Each step is an operation applied to both sides that keeps the solution set the same, until the unknown stands alone.
Why do I sometimes get two answers?
A quadratic can cross the axis twice, so it can have two solutions. A degree-n polynomial has up to n. The graph shows where each one comes from.
How do I know whether to factor or use the quadratic formula?
Try factoring for a few seconds: look for two numbers that multiply to a·c and add to b. If nothing obvious appears, the discriminant b² − 4ac tells you how many real roots there are, and the formula finds them without guessing.
Deler av denne siden er tilpasset fra OpenStax Prealgebra 2e (CC BY-NC-SA 4.0). Kondensert og re-forklaret her, feil er vår.
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