12） f(x) = x3 – 8x2 + kx – 20 When f(x) is divided by x - 1, the remainder is R.
When f(x) is divided by x - 2, the remainder is 4R.
Find the value of k.​

multiply then divide

step-by-step explanation:

a reflection across the x axis and a 90 degree rotation left and right.

so the rectangle is 80cm (area)

now to find the area of a triangle.

base times height.

4 times 8.

your answer is 96cm.

hope this .