1. x+y=-2+5
=3
2. ab-xy=4(-3)-(-2)5
=-12-(-10)
=-12+-10
=-22
3. 3a/b=3(4)/-3
=12/-3
=-4
4. (x-y) ²=(-2-5)²
=(-7)²
=49
5. 2(3b+5)²=2[3(-3)+5]²
=2(-9+5)²
=2(16)
=32
