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1.Factor the expression . Show your work. 

AngelRay  Jan 27, 2018
 #1
avatar+94126 
+3

Q1

 

 

\(3x^3+4x^2-15x-20\\ x^2(3x+4)-5(3x+4)\\ (x^2-5)(3x+4)\)

Melody  Jan 27, 2018
 #2
avatar+94126 
+3

\(p^2+4p=1\\ p^2+4p+(\frac{4}{2})^2=1+(\frac{4}{2})^2\\ p^2+4p+4=1+4\\ (p+2)^2=5\\ p+2=\pm\sqrt5\\ p=-2\pm\sqrt5\\\)

Melody  Jan 27, 2018
 #3
avatar+7339 
+3

3.

(a2 + 3a - 7)(2a2 - a + 4)

 

=  a2(2a2) + a2(-a) + a2(4) + 3a(2a2) + 3a(-a) + 3a(4) + (-7)(2a2) + (-7)(-a) + (-7)(4)

 

=  2a4  +  -a3  +  4a2  +  6a3  +  -3a2  +  12a  +  -14a2  +  7a  +  -28

 

=  2a4  +  5a3  -  13a2  +  19a  -  28

hectictar  Jan 27, 2018

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