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umka2103 [35]
3 years ago
6

Expand and simplify 5(2x-1) + 2(3x-6)

Mathematics
1 answer:
aleksklad [387]3 years ago
8 0
5                     (2x-1)     +            2(3x-6)

I could only expand it :)
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(5x – 3y) (3x + 4y)​
MariettaO [177]

Answer:

\boxed{\red{15 {x}^{2}  + 11xy - 12 {y}^{2}}}

Step-by-step explanation:

\blue{(5x - 3y)(3x + 4y)} \\ \blue{5x(3x + 4y) - 3y(3x + 4y)} \\ \blue{15 {x}^{2}  + 20xy - 9xy - 12 {y}^{2} } \\ \pink{=  15 {x}^{2}  + 11xy - 12 {y}^{2} }

6 0
3 years ago
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Veronika [31]
\text {Volume =}  \dfrac{1}{3}  \pi  r^{2} h

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3 years ago
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katrin [286]
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5 0
3 years ago
Help please?????!!.....
Aleksandr [31]
<span>this polynomial has a repeated factor in (x - 2). so its true</span>
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3 years ago
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Plzz help me to find coefficient in binomial theorem (25 points)
Viefleur [7K]

<em>Denote x2 by y. </em>

<em>  </em>

<em>(x2-3)7=(y-3)7 </em>

<em>  </em>

<em>This is a binomial expansion in y, and you want the coefficient of y4 because y4=x8 </em>

<em>  </em>

<em>You have 7 terms of (y-3) in (y-3)7.  To get the fourth power of y, you need to choose y from four of the terms.  The number of ways you can do this is the combinations of 7 things taken 4 at a time.  This is: </em>

<em>  </em>

<em>7!/(4!3!)=35</em>

<em />

<em>So, the coefficient of x8 in the given expansion will be 210.</em>

<em>HOPE IT HELPS</em>

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3 years ago
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