Answer:To evaluate the expression (3x^2)(5x - 7), we need to distribute the 3x^2 to both terms inside the parentheses.
First, let's distribute 3x^2 to 5x:
(3x^2)(5x) = 15x^3
Next, let's distribute 3x^2 to -7:
(3x^2)(-7) = -21x^2
Now, we have two separate terms: 15x^3 and -21x^2.
Therefore, the simplified expression is:
15x^3 - 21x^2
In summary, when we evaluate (3x^2)(5x - 7), we distribute 3x^2 to each term inside the parentheses and simplify to get 15x^3 - 21x^2.
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