A student preformed the following steps to find the solution to the equation X2-2x-8=0. Where did the student go wrong?

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 sixth grade 13 out of 20 students have a dog if there are 152 sixth grade students how many of them have a dog

Which radical expression is a rational number? a. √ 360 b. √ 644 c. √ 225 d. √ 122