Question

1. (a+b+c)²

$2.(a-b-c) {}^{2}$



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Answer 1

Step-by-step explanation:

1) (a+b+c)²=a²+b²+c²+2ab+2bc+2ca

2)(a-b-c)²=a²+b²+c²-2ab+2bc-2ca

Answer 2

Step-by-step explanation:

$a \times 2 + b \times 2 + c \times 2 ... \\ ....a \times 2 - b \times 2 - c \times 2$

AND NOW a²+² - B²+² - c²+²

as a⁴-b⁴-c²

AND SO THE ANSWER WILL

A⁴-B⁴-C⁴