SOLUTION: 1. Factor out the GCF: {{{4x^2+36y^2}}} = is my answer correct cane some one please check for me {{{2^2x^2+2^2*3^2y^2}}} 4(x^2+9y^2) 2. Factor by grouping: 3x^2-12x+5x-

Question 75789: 1. Factor out the GCF: = is my answer correct cane some one please check for me
4(x^2+9y^2)

2. Factor by grouping: 3x^2-12x+5x-20
(x-4) (3x+5) please see if my answer is correct when it say grouping what should i do .
thanks
Answer by Edwin McCravy(20055) (Show Source): You can put this solution on YOUR website!


1. Factor out the GCF:
 = is my answer correct 
can someone please check for me  


Yes that's correct 


2. Factor by grouping: 
 please see if my answer is correct 
when it say grouping what should i do .

You got the correct answer by inspection of the FOIL
method but you skipped the intermediate steps, which
makes the process easier:

3x� - 12x + 5x - 20

Factor 3x out of the first two terms 

3x(x - 4) + 5x - 20

Factor 5 out of the last two terms

3x(x - 4) + 5(x - 4)

I'll do some coloring:

3x(x - 4) + 5(x - 4)

Factor the red (x - 4) out leaving
the sum of the green factors in 
parentheses

(x - 4)(3x + 5)

Edwin

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