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Needed help for this equation.

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2 Answers

(6-5x)(6+5x)= 
 
you need to visualize the foil method, Krill.
 
first start with the 6 in the first set and multiple with the second set <whole>
6 (6+5x) = 36+30x
 
second start with the -5x in the first set and multiple with the second set <whole>
-5x (6+5x) = -30x-25x^2
 
note
x^2 = x to the 2nd power  
 
after the basic foil is done, you must combine all like terms. 
x^2 terms may not be combine with 2x terms in short.
 
36-25x^2 should be your answer.

Comments

Let the student work a little bit himself. I referred to my previous answer for him to guide himself to the right solution.

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