Ответ:

Объяснение:

1) х(2х-1)-3х(3-5х) = 2х²-х-9х+15х² = х(2х-1-9+15х)

При х=-2:

-2 (2×(-2)-10+15(-2)) = -2(-4-10+(-30)) = -2 (-44) = 88

2) 2аb(3a²-2b²)-3ab(ab²-a²) = ab (2(3a²-2b²) - 3(ab²-a²)) = ab ((6a²-4b²)-(3ab²-3a²)) = ab (6a²-4b² - 3ab²+3a²) = ab(9a²-4b²-3ab²)

При а=1, b=-2:

1×(-2) (9×1²-4×(-2)²-3×1×(-2)²) = -2(9-16-12) = -2×(-19) = 36