Question

5(1-2x+x²)-6(x²-3x-7)=x²-3x-[2x²-10x]-2


plis respondan es urgente :(

Answer 1

Explicación paso a paso:

5(1-2x+x²)-6(x²-3x-7)=x²-3x-[2x²-10x]-2

5 - 10x + 5x² - 6x² + 18x + 42 = x² - 3x - 2x² + 10x - 2

5x² - 6x² - x² + 2x² - 10x + 18x + 3x - 10x = -2 -5 -42

0x² + 21x = - 49

x = - 49/21 = 7/3