Question 88893
Find each product:


1. {{{(3x)(4x^3)(-x^5)}}}


This can be written as: 


{{{( 3x * 4x^3 * (-x^5))}}} 


Multiplying the numbers and the variables(to add the powers) we get: 


{{{ -12 x * x^3 * x^5 }}}


{{{ - 12 x^9 }}} 


Hence, the solution. 


2. {{{5x^3(4x^5-2x)}}}


This can be written as: 


{{{ 20x^8 - 10x^4 }}} This is obtained by multiplying we get these terms.. 


Hence, the solution. 


3. (5x-2y)^2


This is of the form {{{(a - b)^2 = a^2 - 2ab + b^2}}} 


Expanding this using the above formula, we get: 


{{{25x^2 + 4y^2 - 20xy}}} 


Hence, the solution. 


 
4. (5x+1)(3x^2-3x-2)


Using distributive law and Multiplying terms, we get: 


{{{(15x^3 + 3x^2 - 15x^2 - 3x - 10x - 2)}}} 


==> {{{(15x^3 + 3x^2 - 15x^2 - 13x - 2)}}} 


Hence, the solution. 



Regards
Chitra