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Rozwiązane

Proszę o szybkie rozwiązanie!
3/4 - (1/4x + 1/2) = ?
3p (- 2p² + 5p - 2) = ?
x (2y - 54 x²) = ?

Odpowiedź :

SoeCrugo

3/4 - (1/4x + 1/2)=3/4-1/4x-1/2=-1/4x+3/4-1/2=-1/4x+3/4-2/4=-1/4x+1/4

3p (- 2p² + 5p - 2)=-3p·2p²+3p·5p-3p·2=-6p³+15p²-6p

x (2y - 54 x²)=2xy-x·54x²=-54x³+2xy

Magdago

Odpowiedź:

[tex]\frac{3}{4}-(\frac{1}{4}x+\frac{1}{2})=\frac{3}{4}-\frac{1}{4}x-\frac{1}{2}=-\frac{1}{4}x+\frac{3}{4}-\frac{1}{2}=-\frac{1}{4}x+\frac{3}{4}-\frac{2}{4}=-\frac{1}{4}x+\frac{1}{4}\\\\\\3p(-2p^2+5p-2)=3p\cdot(-2p^2)+3p\cdot5p-3p\cdot2=-6p^3+15p^2-6p\\\\\\x(2y-54x^2)=x\cdot2y-x \cdot54x^2=2xy-54x^3[/tex]

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