Question

[vũ linh]

viết thành bình phương của 1 biểu thức:

d,\(17\pm12\sqrt{2}\)

e,\(9\pm4\sqrt{5}\)

f,\(19\pm8\sqrt{3}\)

Answer 1

[missing you =]

\(d,17\pm12\sqrt{2}=3^2\pm2.3.2\sqrt{2}+\left(2\sqrt{2}\right)^2=\left(3\pm2\sqrt{2}\right)^2\)

\(e,9\pm4\sqrt{5}=2^2\pm2.2\sqrt{5}+\left(\sqrt{5}\right)^2=\left(2\pm\sqrt{5}\right)^2\)

\(f;19+8\sqrt{3}=4^2\pm2.4.\sqrt{3}+\left(\sqrt{3}\right)^2=\left(4\pm\sqrt{3}\right)^2\)

Answer 2

[vũ linh]

tat the