If I am reading the question correctly it would come out to -6x+42 First do all the addition and squaring, then factor in that negative. You come out to -2x^3 +2x^3-4x-2x+25+5+9+3. The x^3's cancel, the -x's add to -6x, then all that other adds to 42.
A = 1/2 bh = 1/2 (3)(4) = 12/2 = 6
answer is B. 6 square units
The answer would be b.100 because its clearly not a right triangle
