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marishachu [46]
3 years ago
7

(x+5)(x-4)(x+2) is identical to x^3+ax^2

Mathematics
1 answer:
nikdorinn [45]3 years ago
4 0

Answer:

a = 3

Step-by-step explanation:

Factorize (x+5)(x-4)(x+2)

(x+5)(x-4)(x+2)

=  (x²-4x+5x-20)(x+2)

= (x²+x-20)(x+2)

= (x³+2x²+x²+2x-20x-40)

= x³+3x²-18x -40

Compare with x^3+ax^2

3x² = ax²

3 = a

Rearrange

a = 3

Hence the value of a that makes the expressions identical is 3

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Step-by-step explanation:

This problem bothers on the density of substances

Given data

Mass of substance m= 16kg

Volume of substance v = 2L

the equation that relates the volume. V. to the mass, m is the expression for density

ρ= mass/volume

Substituting our given data

ρ= 16/2= 8kg/L

Using the density calculated above we can get the volume liters, of 128kg of liquid

8= 128/v

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Step-by-step explanation:

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3 years ago
The length of a spring varies directly with the mass of an object that is attached to it. When a 30-gram object is
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Answer:

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------

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Step-by-step explanation:

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