Correct answer: \(x^2 - (α + β)x + αβ\)
Explanation:
The general form of a quadratic polynomial whose zeroes are α and β is:
\(x^2 - (α + β)x + αβ\)
Here,
- \(α + β\) is the sum of the zeroes
- \(αβ\) is the product of the zeroes
Hence, the correct form is: \(x^2 - (α + β)x + αβ\)
Let \( M \) be a \( 7 \times 7 \) matrix with entries in \( \mathbb{R} \) and having the characteristic polynomial \[ c_M(x) = (x - 1)^\alpha (x - 2)^\beta (x - 3)^2, \] where \( \alpha>\beta \). Let \( {rank}(M - I_7) = {rank}(M - 2I_7) = {rank}(M - 3I_7) = 5 \), where \( I_7 \) is the \( 7 \times 7 \) identity matrix.
If \( m_M(x) \) is the minimal polynomial of \( M \), then \( m_M(5) \) is equal to __________ (in integer).