Final answer:
The correct answer for the expression (7+3)² is option B, which is (10)², resulting in the value of 100.
Step-by-step explanation:
The question asks what the first part of a formula would look like, and provides various expressions inside parentheses followed by a squared notation. To solve this, we must square the number inside each set of parentheses. For instance:
- (7+3) becomes (10) and squared is (10)² which equals 100.
- (3-7) becomes (-4) and squared is (-4)² which equals 16.
- (7-3) becomes (4) and squared is (4)² which equals 16.
The options given were A. (x₂-x₁)², B. (10)², C. (-4)², D. (4)². The correct answer reflecting the expressions provided would be B, which is (10)² yielding a result of 100.