Question

atribua a x os valores -4,-2,-1,0,1 e 2,calcule os valores para y,sendo a funçao y=x2+2x-3(funçao quadratica)

Answer 1

 -4,-2,-1,0,1 e 2,calcule os valores para y,sendo a funçao
 
y=x2+2x-3

x = - 4 ==> y=(-4)2+2(-4)-3 ==> y = 16-8-3 ==> y= 5

x = - 2 ==> y=(-2)2+2(-2)-3 ==> y = 4-4-3 ==> y= - 3

x = - 1 ==> y=(-1)2+2(-1)-3 ==> y = 1-2-3 ==> y= - 4

x =   0 ==> y=(0)2+2(0)-3 ==> y = 0-0-3 ==> y= - 3

x =   1 ==> y=(1)2+2(1)-3 ==> y = 1+2-3 ==> y= 0

x =  2 ==> y=(2)2+2(2)-3 ==> y = 4-4-3 ==> y= - 3