Question

resolva y=x2-7x+10
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Answer 1

Resposta:

y = x² - 7x + 10

0 = x² - 7x + 10

x² - 7x + 10 = 0

a = 1; b = - 7; c = 10

Δ = b² - 4ac

Δ = (-7)² - 4.1.10

Δ = 49 - 40

Δ = 9

x = - b +/- √Δ  = - (-7) +/- √9

         2a                2.1

x = 7 + 3 = 10/2 = 5

       2

x = 7 - 3  = 4/2 = 2

        2

R.: x = 2 e x = 5

Answer 2

y = x² - 7x + 10

0 = x² - 7x + 10

x² - 7x + 10 = 0

a = 1; b = - 7; c = 10

Δ = b² - 4ac

Δ = (-7)² - 4.1.10

Δ = 49 - 40

Δ = 9

x = - b +/- √Δ = - (-7) +/- √9

2a 2.1

x = 7 + 3 = 10/2 = 5

2

x = 7 - 3 = 4/2 = 2

2

R.: x = 2 e x = 5