Mathematics for IGCSE & O level - Algebraic Manipulation (Section 1 - No. 1)
If an expression has a negative 'c' value in the quadratic equation ax² + bx + c, what does that indicate about the signs of the factors?
Both factors are positive.
Both factors are negative.
The factors have different signs.
The signs of the factors cannot be determined.
解释
When 'c' is negative, the factors have opposite signs.