Question

Resolva a função quadrática:

a) f(x)= 2x²-8x
b)f(x)= x² -16
c)f(x)=5x²

Answer 1

Resolva a função quadrática:a) f(x)= 2x²-8x

2x²-8x = 0

x(2x - 8) = 0

x1= 0

2x - 8 = 0 ==> 2x = 8 ==> x = 4
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b)f(x)= x² -16

x^2 - 16 = 0 ==> ^2 = 16 ==> x = +/- 4
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c)f(x)=5x²

5x^2 = 0 ==> x^2 = 0/5 ==> x^2 = 0 ==> x = 0