tolong dikerjakan,soalnya hari ini mau dikumpulkan!please

kurang jls maaf......

[tex]a. \sqrt{ u^{2}-4u+4 } = \sqrt{(u-2)^2} =u-2 \\ b. \sqrt{p^2+8pq+16q^2} = \sqrt{(p+4q)^2}=p+4q \\ c. \sqrt{4m^2-20m+25}= \sqrt{(2m-5)^2} =2m-5 \\ d. \sqrt{49a^2+28ab+4b^2} = \sqrt{(7a+2b)^2}=7a+2b [/tex]