Sagot :
bjr
H= 5(2-3x)-(2x-1) (3+x)
= 5*2 + 5*(-3x) - (2x*3 +2x*x - 1*3 - 1*x)
= 10 - 15x - (6x + 2x² - 3 - x)
= 10 - 15x - 6x - 2x² + 3 + x
= -2x² - 20x + 13
bjr
H= 5(2-3x)-(2x-1) (3+x)
= 5*2 + 5*(-3x) - (2x*3 +2x*x - 1*3 - 1*x)
= 10 - 15x - (6x + 2x² - 3 - x)
= 10 - 15x - 6x - 2x² + 3 + x
= -2x² - 20x + 13