Răspuns:
Explicație pas cu pas:
=2√15*(√5√6+8√6-6√6)-5√10
=2√15*7√6-5√10
= 14√90-5√10
= 14*3√10-5√10
=42√10-5√10
=37√10
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c)
=12√6*(11√6-9√6+7√6-10√6)+3√10*8√5
=12√6*(-√6) +24√50
=12*(-6) +24√50
=-72+24*5√2
= -72 + 120√2
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d)
=21√2*( 23-10√2)+6√2*(7√2-6√2)
=483√2-210*2+6√2*√2
= 63√2+6*2
=63√2 +12
