Question

${(a + b + c + )}^{2} - {(a - b - c)}^{2}$
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Answer 1

(a+b+c+a-b-c)(a+b+c-a+b+c)

Answer 2

Answer:

4a(b+c)

Step-by-step explanation:

Let x=  a+b+c & y = a-b-c

Hence our eqn reduces to the form x^2-y^2

=(x+y)(x-y)

Now we will substitute the value of x & y back

(x+y)(x-y)={( a+b+c) + (a-b-c)}{( a+b+c) - (a-b-c)}

= {2a}{a+b+c - a +b + c}

=2a(2b + 2c)

=4a(b+c)

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