Răspuns:
a = √5 × (4√2 + 3√5) - (2√10 + 3)
a = 4√10 + 3√25 - (2√10 + 3)
a = 4√10 + 15 - 2√10 - 3
a = 2√10 + 12
b = 2√7 × (3 - √3) + 2( 4√18)
b = 6√7 - 2√21 + 2 (12√2)
b = 6√7 - 2√21 + 24√2
Ma = (a + b)/2
Ma = ( 2√10 + 12 + 6√7 - 2√21 + 24√2)/2
Ma = [ 2( √10 + 6 + 3√7 - √21 + 12√2)]/2
Ma = √10 + 6 + 3√7 - √21 + 12√2
Mg = √ (a×b)
Mg = √ ( 2√10 + 12 × 6√7 - 2√21 + 24√2)
Mg = √ (2√10 + 72√7 - 2√21 + 24√2)
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