Rozwiązane

Doprowadź do najprostszej postaci:

( 8x – 2y + 5) + ( - 2x +4y) =



– ( 3a +2b – 7) – (a – 5b) – ( 3b + 3a) =



-2a( a – 2b) – 4,5b( -4a + 6) =



( 2x -6y)( 3y -4x) =



( 15x2 + 9x – 6 ) : ( - 3/4 ) =

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Odpowiedź :

Jola6609

Zadanie

(8x - 2y + 5) + (- 2x + 4y) = 8x - 2y + 5 - 2x + 4y = 6x + 2y + 5

- (3a + 2b - 7) - (a - 5b) - (3b + 3a) = -3a - 2b + 7 - a + 5b - 3b - 3a = -7a + 7

-2a(a - 2b) - 4,5b(-4a + 6) = -2a² + 4ab + 18ab - 27b = -2a² + 22ab - 27b

( 2x - 6y)·( 3y - 4x) = 6xy - 8x² - 18y² + 24xy = -8x² - 18y² + 30xy

(15x² + 9x - 6) : (- 3/4 ) = (15x² + 9x - 6) · (-4/3) = -20x² - 12x + 8

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