To simplify the expression \(-7(-7 + 3g)\), we will distribute \(-7\) across the parentheses.
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Distribute \(-7\) to both terms inside the parentheses: \[ -7 \cdot -7 + (-7) \cdot 3g \]
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Calculate each term:
- The first term: \(-7 \cdot -7 = 49\)
- The second term: \(-7 \cdot 3g = -21g\)
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Combine the results: \[ 49 - 21g \]
So, the simplified expression is: \[ 49 - 21g \]