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VLD [36.1K]
2 years ago
5

49x^2 + 42xy + 9y^2 Factor completely.

Mathematics
2 answers:
Oduvanchick [21]2 years ago
8 0
49x^2+42xy+9y^2

To factor a quadratic of the form ax^2+bx+c, you must find two values, j and k, which satisfy two conditions:

jk=ac=441 and j+k=42, so j and k must be 21 and 21.

Now replace bx with jx and kx in the original equation.

49x^2+21xy+21xy+9y^2  now factor 1st and 2nd pair of terms...

7x(7x+3y)+3y(7x+3y)  which is equal to

(7x+3y)(7x+3y)  which is equal to

(7x+3y)^2
mario62 [17]2 years ago
6 0
(7x-3y)^2 hope this helps
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3(x+14)=42 plz need help now
lina2011 [118]

Answer:

0

Step-by-step explanation:

So we have the equation:

3(x+14)=42

Divide both sides by 3:

x+14=14

Subtract 14:

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The value of x is 0

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The correct answer is 9.481.
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Vladimir [108]

105 i think nvm not corrupted picture

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3 years ago
The area of a circle is 2464cm2.calculate it's diameter to 2 significant figures<br>​
tigry1 [53]

Answer:

hi

Step-by-step explanation:

Answer:

The diameter of the circle is 56 cm.          

Step-by-step explanation:

Given : The area of the circle is 2464 cm square.

To find : The diameter of the circle?

Solution :

The area of the circle is defined as

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r is the radius

Substituting the values,

Radius of the circle is 28 cm.

The diameter of the circle is  

Therefore, The diameter of the circle is 56 cm.

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2 years ago
10. Use the formula for the
dimulka [17.4K]

9514 1404 393

Answer:

  48 m³

Step-by-step explanation:

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  V = 1/3Bh

For the given values, the volume is ...

  V = 1/3(36 m²)(4 m) = 48 m³

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3 years ago
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