The mystery number is a four-digit number. Its digits are 5, 4, 7, and 3. The 5 and the 7 are the two middle digits.The 5 comes
2 answers:
Answer:
Step-by-step explanation:
Given: The mystery number is a four-digit number.
The digits used to make the number : 5, 4, 7, and 3.
Since , 5 and the 7 are the two middle digits.
Then , the number would look like
The 5 comes after the 7.
Then , the number would look like [i.e.
is not representing the mystery number]
The 3 is not the first digit, then 4 must be the first digit.
Hence, the mystery number should be :
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Answer:
Step-by-step explanation:
Given
x² + x
To complete the square
add ( half the coefficient of the x- term )² to x² + x
x² + 2( )x + (
)² = x² + x +
= (x + )² ← perfect square