How to convert 3.8 repeating until it's simplest form

Find the value of p for which the polynomial 3x^3 -x^2 + px +1 is exactly divisible by x-1, hence factorise the polynomial

In the diagram, the ratios of two pairs of corresponding sides are equal to prove that almn - axyz by the sas similarity theorem, it also needs to be shown that x 6 z un z zz un = 2x zləzz lezy

Write 5(6x+4)-2(5x-2) in the form a(bx+c) where a, b and c integers and a> 1