Question

Daca 3x=4y determina ( x^2-xy):y^2

Answer 1

Răspuns:

Explicație pas cu pas:

3 x = 4 y ⇒  x = 4 y/3

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( x² - xy ) : y² = 4/9

= [ (4y/3)² - ( 4y/3) × y ] : y² =

= ( 16y²/9 - 4 y²/3 ) : y² =

= ( 16 y² / 9 - 12 y²/9 ) : y² =

= ( 4 y²/9 ) × (1/y²) =

= 4/9