Question

Calcule as raízes da equação x²-3x=10

Answer 1

x²-3x-10=0

∆=(-3)²-4.1.(-10)
∆=9+40
∆=49

x= -(-3)±√49/2.1
x= 3±7/2

x1=3+7/2=10/2=5

x2=3-7/2= -4/2=-2

Answer 2

Iguale à zero:
x^2 -3x -10=0

a=1
b= -3
c= -10

3^ -4×1×-10
9+40
raiz de 49
delta = 7

x' = 3+7= 10/2
x'=5


x" = 3 -7= -4/2
x"= -2

raízes: {-2;5}