Mathematics for IGCSE & O level - Algebraic Manipulation (Section 2 - No. 33)
If an expression is in the form x² + bx + c, and if 'b' is negative and 'c' is positive, what are the signs of the factors?
Both positive
Both negative
One positive, one negative
Cannot be determined
Giải thích
If b is negative and c is positive, the factors will be two negative numbers.