Mathematics for IGCSE & O level - Algebraic Manipulation (Section 5 - No. 8)
What is the first step when factoring the expression 3x² - 12?
Apply the difference of two squares
Find two numbers that add to -12
Factor out the common factor
Use the quadratic formula
คำอธิบาย
The common factor of 3 can be factored out, simplifying the expression to 3(x² - 4).