Answer:
Question 3 - B
Question 5 - A
Step-by-step explanation:
Question 3
-2(x+6)(x-1) - answer B
Expand the brackets
(x+6)(x-1) = x² - x + 6x - 6
Simplify = x² + 5x - 6
Now multiply this by -2
-2(x² + 5x - 6) = -2x² + 10x + 12
Question 5
5(x² + 8)(x² - 8) - answer A
First expand brackets.
(x² + 8)(x² - 8) = x⁴ - 8x² + 8x² - 64
8x² cancels out to x⁴ - 64
Now multiply this by 5
5(x⁴ - 64) = 5x⁴ - 320
Hope this has helped. These are the answers I can help with.
