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Alex777 [14]
2 years ago
12

Simplify the expression -4x^2(3x − 7).

Mathematics
2 answers:
satela [25.4K]2 years ago
5 0

Answer:

Step-by-step explanation:

Simplify the expression -4x^2(3x − 7).

A. -12x^3 + 28

<h2>B. -12x^3 + 28x^2<= your answer</h2>

C. -12x^3 − 28

D. -12x^3 − 28x^2

Ksivusya [100]2 years ago
4 0

Answer:

B) -12x³ + 28 x².Step-by-step explanation:

Given  : -4x²(3x − 7).

To find : Simplify the expression

Solution : We have given that

-4x²(3x − 7).

Distribute  -4x² over 3x − 7.

-4x² (3x)  -  -4x²( 7).

-12x³ + 28 x².

Therefore, B) -12x³ + 28 x².

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2 years ago
Answer and explanation please
mote1985 [20]

Answer:

x=17, y=12

Step-by-step explanation:

From the figure we know that,

Angle CDB = 4x-5

Angle BDE = 10y-3

Angle DEA= 97-2x

Though we are NOT given that line segments BD and AE are parallel, we may assume so by the construction of the triangle.

Hence, BD II AE and are cut by the transversal CE,

Hence,

Angle CDB = Angle CEA  {Corresponding angles are equal}

4x-5=97-2x\\4x+2x=97+5\\6x=102\\x=17\\\\So,\\Angle\ CDB\ = (4x-5) = (4*17-5) = (68-5) = 63

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