Answer and explanation.
1. We distribute the negative sign to the -3 inside the parentheses. Thus, the answer for (1) is 3.
2. We simplify (-3)^2 - 4(1)(-10):
(-3)^2 - 4(1)(10) = 9 + 40 = 49
Thus, the answer for (2) is 49.
3. We simplify 2(1) by multiplying 2 and 1. Thus, the answer for (3) is 2.