The simplified form the expression (7 - 5(3)²) is -38.
Simplification is the process involved in replacing a mathematical expression by an equivalent one which is that is usually simpler and shorter.
For example;
a + b + 2a + 2b = 3a + 3b.
Given the expression in the question;
7 - 5(3)²
Simply each term, raise 3 to the power of 2
7 - 5(3)²
7 - 5(9)
Multiply -5 and 9
7 - 5(9)
7 - 45
Subtract 45 from 7
-38
Therefore, the simplified form the expression (7 - 5(3)²) is -38.
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