Answer:
1. 15x-10
2. x²-x-12
3. x²-8x+12
4. 2x³+4x²-30x
5. 6x³- 12x²+6x
6. 4x³+12x²-20x
Step-by-step explanation:
4.2x(x+5)(x-3)
= 2x(x²-3x+5x-15)
= 2x(x²+2x-15)
= 2x³+4x²-30x
<em>a)</em> The perimeter of question a's shape is 18 units.
<em>b)</em> The answer to question b is 28 ft.
d. 2t - 5 because 1/3×6t is 2t and -15×1/3 is -5