Question

PACKAGE
1.
If a > 0 and b< 0, then a - b =​

Answer 1

Step-by-step explanation:

a-b will always be greater then zero, whatever value you put

Example

a=5

b= -5

a-b= 5-(-5)

=10

Answer 2

If a>0, then b<0⟹ab<0.

And I have:

a,b>0⟹ab>0(7')

I wrote:

As a>0 and ab<0 then b<0, otherwise this would contradict 7′