To split the middle term of the quadratic equation \( x^2 - 13x + 42 = 0 \), we need to find two numbers that multiply to 42 (the constant term) and add up to -13 (the coefficient of the middle term).
The two numbers that fit these criteria are -6 and -7, because:
- \( -6 \times -7 = 42 \)
- \( -6 + (-7) = -13 \)
Thus, when we rewrite the equation, we can express it as:
\[ x^2 - 6x - 7x + 42 = 0 \]
So we can fill in the blanks as follows:
\( x^2 + (-6)x + (-7)x + 42 = 0 \)
Therefore, the answer is:
-6 and -7 (with -6 being the lesser value).