4ab+2(a^2-2ab+b^2)=4ab+2a^2-4ab+b^2=2a^2+b^2
= ( V 18 ) * ( V 2 ) + ( V 3 ) * ( V 2 ) - 0,5 ( V 24 ) = ( V 36 ) + ( V 6 ) - ( 0,5 * 2 ) V 6 = 6 + ( V 6 ) - ( V 6 ) .= 6
1) 5(x+y) = 5x+5y
2) 1/3xy = xy/3
3) (5x+5y) - xy/3 = (15x + 15y - xy) /3
F'(x) = [(2 +√ x)'(2 - √ x) - (2 + √ x)(2 - √ x)'] / (2 - √ x)² =
= [(1/2√ x)(2 - √ x) - ( 2 + √ x)( - 1/2√ x)] / (2 - √ x)² =
= [1/2√ x (2 - √ x + 2 + √ x)] / (2 - √ x)² = (2/√ x) / (2 - √ x)² = 2/ [√ x(2 - √ x)²]
Решение приложено
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