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-Dominant- [34]
3 years ago
6

Which polynomial is a perfect square trinomial?

Mathematics
2 answers:
sineoko [7]3 years ago
4 0
Assuming the 2nd one is 4a^2 - 20a +25, it is the one you're looking for. It factors to be (2a-5)^2
Mnenie [13.5K]3 years ago
4 0

Answer:

4a^2 - 20a+25

Step-by-step explanation:

Since, for a perfect square trinomial the value of discriminant = 0,

That is, if for a quadratic equation ax^2+bx+c

D=b^2-4ac=0

Then, ax^2+bx+c is a perfect square trinomial,

For 49x^2 - 28x+16,

(-28)^2-4\times 49\times 16=-2352\neq 0

⇒ 49x^2 - 28x+16 is not a perfect square trinomial,

For 4a^2 - 20a+25,

(-20)^2-4\times 4\times 25=400-400=0

⇒ 4a^2 - 20a+25 is a perfect square trinomial,

For 25b^2 - 20b - 16,

(-20)^2-4\times 25\times -16=2000\neq 0

⇒ 25b^2 - 20b - 16 is not a perfect square trinomial,

For 16x^2 - 24x - 9,

(-24)^2-4\times 16\times -9=1152\neq 0

⇒ 16x^2 - 24x -9 is not a perfect square trinomial,

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Por término de temporada varias tiendas liquidan pantalones. Su precio de temporada era de $6. 990. Si quiero comprar tres panta
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La tienda que ofrezca la mejor oferta por tres pantalones será aquella que tenga el mayor descuento de liquidación posible.

<h3>Análisis contextual de una pregunta incompleta</h3>

En este problema no es posible determinar cuántas tiendas existen ni los descuentos de liquidación (x) correspondientes a cada uno y que todas las tiendas venden los pantalones al mismo precio de temporada (C).

Las condiciones <em>matemáticas</em> de cada variable es:

C = 6990  (1)

x \in [0, 1)   (2)

n = 3   (3)

La fórmula matemática para el precio final (C'), en pesos, es la siguiente:

C' = 3\cdot (6990)\cdot (1-x)   (4)

Consideremos el caso de N tiendas, cada una con un descuento de liquidación por cada pantalón y que ese descuento es aplicable a la compra de tres pantalones, entonces la tienda que ofrezca la mejor oferta por tres pantalones será aquella que tenga el mayor descuento de liquidación posible. \blacksquare

Para aprender más sobre precios, invitamos cordialmente a ver esta pregunta verificada: brainly.com/question/26364348

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