Question

cu rezolvare(b,c,d,e,f)......va roog! ....dau COROANĂ ​

Answer 1

b) Ma=4-2V3+4+2V3/2= 4

Mg=radical mare din 4-2V3×4+2V3=radical mare din 4-6V3

c)

$\sqrt{15 - 6 \sqrt{6} } + \sqrt{7 - 2 \sqrt{6 } } = \sqrt{(3 - { \sqrt{6} }^{} } ) {}^{2} + \sqrt{(1 - \sqrt{6} } ) {}^{2} = 3 - \sqrt{6} + \sqrt{6} - 1 = 2$

d) (n-3)(n²+3n+9)= n³-3³=n³-27

e) (a+3)×(a-5)

f) (5-k²)=5+k²

25-10k+k²=5+k²

25-10k=5

-10k=5-25

-10k= -20/×(-1)

k=2