hi, can someone please explain to me in working how they ended up with the answer * 12*2k^2+12 . ive tried many times and just not getting that answer
1×(−3)×(k+1)+5×0×k+(−3×k+5)×1×(k+4)−k×(−3)×(−3×k+5)−(k+4)×0×1−(k+1)×1×5=−12×k^2+12
thank you
1×(−3)×(k+1)+5×0×k+(−3×k+5)×1×(k+4)−k×(−3)×(−3×k+5)−(k+4)×0×1−(k+1)×1×5=−12×k^2+12
thank you