Question is Factor If polynomial cannot be factoredsay so Cl

Question is: Factor. If polynomial cannot be factored,say so.

Class Time: 1. (4 points) Fantor. If a nomial cannot h (a) z2 7z t 12. (b) a -12 (c) 8ar -12 (d) 9

Solution

x²-7x+12------> x² -3x-4x+12------------>-x(x-3) - 4(x-3)---------->(x-3)(x-4).

x²-7x-12----------------cannot be factored.

x²-8x-12------------->cannot be factored.

x²-9---------------> (x-3)(x+3)..........as (a²-b²)=(a-b)(a+b)