Answer:

Step-by-step explanation:
If there is 1500 cellular phones per 1000 people, then the number of phones per person is:

Now we know that 
Answer:
Un = -n²
Step-by-step explanation:
Un = -n²
it's a quadratic term but with minus sign, just it
U1 = -1² = -1
U2 = -2² = -4 and so on
Answer: CasioFX-CG50
Step-by-step explanation: you can get it on amazon
-1 as a negative would = X
Answer:
El cuadrado de la suma de dos números es igual a (a + b) ² = a² + 2ab + b²Un producto notable: es una expresión matemática que conocemos ya el resultado, a pesar de la operación ser sencilla tenemos