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Efectuati:
a) 4√7-3+2√7+7
b) 3√13+5-√13-6
c) 0,1√2-3√2-3,2√2
d) -6√5-9√6+9√5
COROANA !!!!


Răspuns :

a) 6√7 + 4
b) √13 - 1
c) -6,1√2
d) 3√5 - 9√6
a) 4√7-3+2√7+7=
=
√7(4+2)-3+7
=6
√7+4
=2(3
√7+2)

b) 3√13+5-√13-6
=
√13(3-1)+5-6
=2
√13-1

 c) 0,1√2-3√2-3,2√2
=
√2(0,1-3-3,2)
=√2×(-6,1)
=-6,1×1,4142=
= - 8,62662

d) -6√5-9√6+9√5
=
√5(9-6)-9√6
=3
√5-9√6
=3(√5-3√6)