Question

Simplifique:
a_ √50 - √98
b_ √12 - 6√3
c_ 8√5 - √20
d_ √20 -√45

Answer 1

a_ √50 - √98 = $\sqrt{2.25}$ - $\sqrt{2.49}$ = 5$\sqrt{2}$ - 7$\sqrt{2}$ = -2$\sqrt{2}$
b_ √12 - 6√3 = $\sqrt{3.4}$ - 6$\sqrt{3}$ = 2$\sqrt{3}$ - 6$\sqrt{3}$ = - 4$\sqrt{3}$
c_ 8√5 - √20 = 8$\sqrt{5}$ - $\sqrt{4.5}$ = 8$\sqrt{5}$ - 2$\sqrt{5}$ = 6$\sqrt{5}$
d_ √20 -√45 = $\sqrt{4.5}$ - $\sqrt{9.5}$ = 2$\sqrt{5}$ - 3$\sqrt{5}$ = $\sqrt{5}$