Problem
What is the missing constant term in the perfect square that starts with \( x^{2}+14 x ? \)
Solution
Step 1 ：\( (x + a)^{2} = x^{2} + 2ax + a^{2} \)
Step 2 ：\( 2a = 14 \)
Step 3 ：\( a = 7 \)
Step 4 ：\( a^{2} = 49 \)
Step 1 ：\( (x + a)^{2} = x^{2} + 2ax + a^{2} \)
Step 2 ：\( 2a = 14 \)
Step 3 ：\( a = 7 \)
Step 4 ：\( a^{2} = 49 \)
