+0  
 
+1
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avatar+1757 

Really need to get this done >.<

 
RainbowPanda  Sep 10, 2018
 #1
avatar+3011 
+2

Hi, RP!

1. Subtracting -3n^2 from -7n^2, we get: \(-7n^2-(-3n^2)=-7n^2+3n^2=4n^2.\)

 

2. \((-8x^4y^3)*(2x^5y^2)+7x^9y^5\) , we can remove the parenthesis, then multiply, then add, to attain: \(-16x^9y^5+7x^9y^5=-9x^9y^5\).

 

3. Again: \((-4a^3b^2)^2*(3a^2b)=16a^6b^4*3a^2b=48a^8b^5.\)

 

4. \(5c^{-7}d^2*(-cd^2)^4\) , simplify, apply the exponent rule, and finally: \(\frac{5d^{10}}{c^3}\) . This might be wrong!!!!

 

5. \(\frac{18w^4x^9}{14w^5x^5}\), division, subtract powers! So, \(\frac{18x^4}{14w}\). Reduce it, to \(\frac{9x^4}{7w}.\)

 

6. \(\frac{15x^2y*-6x^7y}{(3xy)^2}\), remove parenthesis and simplify to get: \(-10x^7\) .

 

Answers:

1. \(4n^2\)

2. \(-9x^9y^5\)

3. \(48a^8b^5\)

4. \(\frac{5d^{10}}{c^3}\)

5. \(\frac{9x^4}{7w}\)

6. \(-10x^7\)

smileysmiley

 
tertre  Sep 10, 2018
 #2
avatar+1757 
0

Thank you SO much!

 
RainbowPanda  Sep 10, 2018

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