10 Bài tập Rút gọn biểu thức (có lời giải)

A. $1968+880\sqrt{5}$;

B. $1973+888\sqrt{5}$;

C. $1968+888\sqrt{5}$;

D. $1973+880\sqrt{5}$.

A. $472-236\sqrt{2}$;

B. $452-236\sqrt{2}$;

C. $472-288\sqrt{2}$;

D. $452-288\sqrt{2}$.

A. $2336-1604\sqrt{2}$;

B. $2384-1608\sqrt{2}$;

C. $2336-1608\sqrt{2}$;

D. $2384-1604\sqrt{2}$.

A. $\frac{9449}{4}+1140\sqrt{2}$;

B. $\frac{9499}{4}+1144\sqrt{2}$;

C. $\frac{9449}{4}+1144\sqrt{2}$;

D. $\frac{9499}{4}+1140\sqrt{2}$.

A. $14149-\frac{68525\sqrt{2}}{8}$;

B. $12149-\frac{68525\sqrt{2}}{8}$;

C. $14149-\frac{68725\sqrt{2}}{8}$;

D. $12149-\frac{68725\sqrt{2}}{8}$.

A. $645+156\sqrt{2}$;

B. $640+153\sqrt{2}$;

C. $645+153\sqrt{2}$;

D. $640+156\sqrt{2}$.

A. $3225+1016\sqrt{2}$;

B. $3227+1016\sqrt{2}$;

C. $3225+1015\sqrt{2}$;

D. $3227+1015\sqrt{2}$.

A. −4;

B. −3;

C. −2;

D. −1.

A. 18;

B. 20;

C. 22;

D. 24.