Answer:
Step-by-step explanation:
x decreased by 60% = (1-0.60)x = 0.40x
x increased by 80% = (1+0.80)x = 1.80x
1. 8 because 8+8=16+1=17
2. 15 because 15-3=12
3. 5 because 5 times 3 =15 and 5times 2=10+5=15
4. 6 because 6times 2 =12 +2=14. And 6+8=14
5. 10 because 6times 10=60
6. 4 because 4+7=11 and 4times2=8+3=11
Step-by-step explanation:
By Factor Theorem, we have:
(x - 1)(x - 2)(x - 3)(x + 3)
= (x² - 3x + 2)(x² - 9)
= x⁴ - 3x³ - 7x² + 27x - 18.
