What is the value of the following expression?
−4515+−3−27+89
2
-2
4
-4
−4515+−3−27+89 =−31+19+89 =−3+1+89 =−3+1 =−2
−4515+−3−27+89
The least value of expression x2+4y2+9z2 - 2x + 8y + 27z + 15 is :