Question

Ex, 2

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Answer 1

a   3x5$\sqrt[]{2}$ - 5x4$\sqrt[]{2}$ + 7$\sqrt{2}$- 3$\sqrt{2}$

= 15$\sqrt{2}$ - 20 $\sqrt{2}$ + 4$\sqrt{2}$

= -5$\sqrt{2}$ + 4 $\sqrt{2}$

= -$\sqrt{2$

b    7$\sqrt{2}$ - 5 $\sqrt{2}$ = 2$\sqrt{2$

c $(-5+4)^{3}$ = $-1^{3}$ = -1

d $2^{5}$ +1/$2^{3}$

= amplifici cu 8 32 + 1/8

= 256/8 +1/8 = 257 /8

e ($\sqrt{30:5}$ + 7$\sqrt{6}$ ) : (-4$\sqrt{3}$)

= (8 $\sqrt{6}$) : (-4$\sqrt{3}$)

= -2$\sqrt{2}$