Mathematics for IGCSE & O level - Algebraic Manipulation (Section 6 - No. 24)
If the coefficient of x in the middle term of a quadratic expression is negative, what does that indicate about the resulting factors when completing the square?
The sign in the bracket will be positive.
The sign in the bracket will be negative.
There will be no brackets in the factored expression.
The expression cannot be factorized.
Giải thích
The sign in the bracket of the squared term will match the sign of the x term.