(x-1) (x-8)

Question

x sqrt +8

Answer 1

Use the distribute property.
(x-1)(x-8) = x(x-8) - 1(x-8)
= x^2-8x - x + 8
= x^2-9x+8

At least check you answer using a numeric value for x to see whether it works.

Answer 2

Thank you