Expanding multiplies out brackets: every term in one factor times every term in the other, then like terms combined. (x + 1)³ expands to x³ + 3x² + 3x + 1. The coefficients are a row of Pascal's triangle.
Esempio svolto · expand (x+1)^3
Ora tu Scegli un problema, o digitare o disegnare il proprio. Ogni passo, un'immagine, la risposta nascosta fino a quando non si chiede.
Simboli utilizzati qui
Toccare qualsiasi simbolo per la definizione completa, un'immagine, e che cosa ogni lettera in esso significa.
Come: Expanding
- Start from the expression.
- Distribute (multiply out) the products.
Domande che la gente chiede
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.
Altro in Algebra
Linear equationsQuadratic equationsSystems of equationsInequalitiesFactoringSimplifying expressionsFunctions and graphsExponential and logarithmic equationsPolynomial equationsAbsolute value