Question

solve:
$(a + b + c) {}^{2} - (a - b + c) {}^{2} + (a + b - c) {}^{2} - (b + c - a) {}^{2}$
its urgent
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Answer 1

Answer:

254. If $a { }^{2} + b {}^{2} + c {}^{2} - ab - bc - ca = 0 \:$then a : b : c is(a ) 1:1:2(b) 1:1:1(c… Get the answers you ...

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