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Lerok [7]
4 years ago
11

Simplify: (4x2 + 8xy + 2y2) − (−9x2 − 4xy − 7y2)

Mathematics
2 answers:
lana66690 [7]4 years ago
6 0
<span>5x2 + 4xy − 5y2 is the answer</span>
Katyanochek1 [597]4 years ago
3 0
The first thing you need to do is to distribute the - throughout the second expression, that will let you get rid of the parenthesis. Then combine the like terms.

(4x2+8xy+2y2)-<span>(−9x2 − 4xy − 7y2)
</span><span>4x2+8xy+2y2+9x2 + 4xy + 7y2
13x2+12xy+9y2

Your answer is C.</span>
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What is the quotient of 5 7 ÷ 5 14 ?
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Answer:

<h2><u>=</u> <u>   57 / 514  </u>    <u>(Decimal: 0.110895)</u></h2>

Step-by-step explanation:

57 / 514

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<u>(Decimal: 0.110895)</u>

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Rewrite the equation as  

x /14 =  5/ 7 .  x/ 14 =  5/ 7

Multiply both sides of the equation by  

14.14  ⋅  x /14 =  14 ⋅ 5 /7

Simplify both sides of the equation.

Tap for fewer steps...

Cancel the common factor of  14 .  

Cancel the common factor.

14 ⋅  x /14 =  14 ⋅ 5 /7

Rewrite the expression.

x = 14 ⋅ 5 /7

Simplify  14 ⋅  5/ 7 .

Cancel the common factor of  7 .

Factor  7  out of  14 .

x = 7 ( 2 ) ⋅ 5/ 7

Cancel the common factor.

x = 7 ⋅  2 ⋅  5/ 7

Rewrite the expression.

x  = 2 ⋅ 5

Multiply  2  by  5 .

<u>x = 10</u>

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3 years ago
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nata0808 [166]

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x = 2

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<em>Distribute</em>

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<em>Distrubute again</em>

3x - 12 = -4x + 2

<em>Add twelve to both sides of the equation</em>

<em>Simpfly</em>

3x = -4x + 14

<em>Add 4x to both sides of the equation</em>

<em>simpfly</em>

7x = 14

<em>Divide both sides of the equation by the same term</em>

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