(a-4)(a+4)=a2-16

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Solution for (a-4)(a+4)=a2-16 equation: 



(a-4)(a+4)=a2-16

We move all terms to the left:

(a-4)(a+4)-(a2-16)=0

We add all the numbers together, and all the variables

-(+a^2-16)+(a-4)(a+4)=0

We use the square of the difference formula

-(+a^2-16)+a^2-16=0

We get rid of parentheses

-a^2+a^2+16-16=0

We add all the numbers together, and all the variables

=0

a=0/1

a=0

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