Mathematics for IGCSE & O level - Algebraic Manipulation (Section 4 - No. 37)
What is the factored form of x² - 8x + 15?
(x - 5)(x + 3)
(x + 5)(x - 3)
(x - 5)(x - 3)
(x + 5)(x + 3)
คำอธิบาย
Find two numbers that multiply to 15 and add to -8. Those numbers are -5 and -3