Question

Calcule
x ao quadrado - 1,5 x+2+(-x ao quadrado + 2,3 x -6)

Answer 1

Juntar os termos semelhantes:

= x² - 1,5x + 2 + (- x ² + 2,3x - 6)

= x² - 1,5x + 2 - x² + 2,3x - 6

= - 1,5x + 2,3x + 2 - 6

= 0,8x - 4

Answer 2

x^2-1,5x+2=0
delta=b^2-4ac
delta=(-1,5)^2-4.1.2
delta=2,25-8
delta=-5,75
-x^2+2,3x-6=0
delta=b^2-4ac
delta=2,3^2-4.(-1).(-6)
delta=5,29-24
delta=-18,71
-5,75+(-18,71)=
-5,75-18,71=-12,96