Question

ajutati maaaaa ex 1 si 2 va rog​

Answer 1

ex 1

4√27 - 5√12 + 3√48 - 2√75=

=4√9*3  - 5√4*3 + 3√16*3 - 2√25*3

= 4*3√3 - 5*2√3 + 3*4√3 - 2*5√3

=12√3 - 10√3 + 12√3 - 10√3

=24√3 -20√3

=4√3

ex 2

$0,(3)x^{2} =\frac{27}{256}\\\\ \frac{1}{3} *x^{2} =\frac{27}{256}\\\\x^{2} =\frac{27}{256}:\frac{1}{3}\\\\x^{2} =\frac{27}{256}*3\\\\x^{2} =\frac{81}{256}\\\\x_1=\frac{9}{16} \\\\x_2= -\frac{9}{16}$