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dsp73
2 years ago
10

Factor the algebraic expression 16a + 36

Mathematics
1 answer:
Studentka2010 [4]2 years ago
7 0

Answer:

<u><em>  4 • (2a + 3b) • (2a - 3b)</em></u>

Step-by-step explanation:

Step  1  :

Equation at the end of step  1  :

 (16 • (a2)) -  (22•32b2)

Step  2  :

Equation at the end of step  2  :

 24a2 -  (22•32b2)

Step  3  :

Step  4  :

Pulling out like terms :

4.1     Pull out like factors :

  16a2 - 36b2  =   4 • (4a2 - 9b2)

Trying to factor as a Difference of Squares :

4.2      Factoring:  4a2 - 9b2

Theory : A difference of two perfect squares,  A2 - B2  can be factored into  (A+B) • (A-B)

Proof :  (A+B) • (A-B) =

        A2 - AB + BA - B2 =

        A2 - AB + AB - B2 =

        A2 - B2

Note :  AB = BA is the commutative property of multiplication.

Note :  - AB + AB equals zero and is therefore eliminated from the expression.

Check :  4  is the square of  2

Check : 9 is the square of 3

Check :  a2  is the square of  a1

Check :  b2  is the square of  b1

Factorization is :       (2a + 3b)  •  (2a - 3b)

Final result :

 4 • (2a + 3b) • (2a - 3b)

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Imaginá que tenés 125 dados cúbicos del mismo tamaño ¿Cuantos dados de altura tiene el cubo de mayor tamaño que podés armar apil
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Answer:

(i) Debemos apilar 5 dados para construir el cubo de mayor tamaño.

(ii) Se necesita 121 dados cuadrados para formar el cuadrado con la mayor cantidad de dados posibles, quedando 4 dados sobrantes.

Step-by-step explanation:

(i) Sabemos por la Geometría Euclídea del Espacio que un cubo es un sólido regular con 6 caras cuadradas y longitudes iguales. Cada dado tiene un volumen de 1 dado cúbico y 125 dados dan un volumen total de 125 dados cúbicos.

El volumen de un cubo está dado por la siguiente fórmula:

V = L^{3}

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V - Volumen del cubo, medido en dados cúbicos.

Ahora, necesitamos despejar la longitud de la arista para calcular la altura máxima posible:

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A = L^{2}

Donde:

L - Longitud de arista, medida en dados.

A - Área, medida en dados cuadrados.

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n = (11\,dados)^{2}

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