PLEASE SOLVE:-

DETERMINANT { -2a a+b a+c

a+b -2b b+c

a+c b+c -2c }

Not sure if this will help: Det ? -2a| -2b b+c | - (a+b)| a+b b+c | + (a+c)| a+b -2b | | b+c -2c | | a+c -2c | | a+c b+c |

formatting, -2a |-2b b+c | - (a+b)| a+b b+c | + (a+c)| a+b -2b | | b+c -2c | | a+c -2c | | a+c b+c |