Question

please expand this pleaseeee by identity​

Answer 1

Answer:

${a + a + a - b + b + b + b + b - c + c + c + c + c + c + c } + { a + a + a - b + b + b + b + b - c + c + c + c + c + c + c}$

This is the answer....

thank me

Answer 2

Step-by-step explanation:

suitable identity is : (a-b-c)²=a²+b²+c²-2ab+2bc-2ca

(√3 a-5b-7c)²

=(√3a)²+(5b)²+(7c)²-2(√3a)(5b)+2(5b)(7c)-2(7c)(√3a)

=3a²+25b²+49c²-10√3ab+70bc-14√3ac