Answer:
6.
Step-by-step explanation:
1. Write the expression.
[tex]7(3h)^2-57h^2[/tex]
2. Substitute the variables by the given value.
[tex]7(3(-1))^2-57(-1)^2[/tex]
3. Solve the left hand side parenthesis.
[tex]7(-3)^2-57(-1)^2[/tex]
4. Solve the exponents.
[tex]7(9)-57(1)[/tex]
5. Multiply.
[tex]63-57[/tex]
5. Subtract.
6.
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https://brainly.com/question/28308470
