Introduction:
To determine whether 0 is greater than the expression -a^2 - ab + 7b^2, we need to evaluate the expression and compare it to 0. Let's break down the expression and analyze it step by step.

Expression:
The given expression is -a^2 - ab + 7b^2.

Step 1: Simplify the Expression:
To evaluate the expression, we need to simplify it. Let's break it down further:

- The term -a^2 represents the square of the variable 'a' with a negative sign.
- The term -ab represents the product of the variables 'a' and 'b' with a negative sign.
- The term 7b^2 represents the square of the variable 'b' multiplied by 7.

Step 2: Combine Like Terms:
Now, let's combine the like terms in the expression:

- The terms -a^2 and -ab are unlike terms and cannot be combined further.
- The term 7b^2 cannot be combined with the other terms.

Step 3: Evaluate the Expression:
To determine whether 0 is greater than the expression, we substitute 0 for all the variables in the expression and simplify:

- Substituting 0 for 'a' and 'b', we get:
- (-0^2) - (0)(0) + 7(0^2)
- 0 - 0 + 0
- 0

Conclusion:
After evaluating the expression, we find that the value is 0. Therefore, 0 is not greater than the expression -a^2 - ab + 7b^2.

0-a2-ab+7b2=a2+ab-7b2