Show all work to factor x^4-10x^2+9.

please help me with this and show all work

Is δ pmr similar to δ smn ? if so, which postulate or theorem proves these two triangles are similar?

Which value of c would make he following expression completely factored? 8x+cy

Jacob signs up to work for 2 1/2 hours at the school carnival. if each work shift is 3/4 hour, how many shifts will jacob work? (i just want to double check : |, for anybody that responds! : )