Question

RESOLVA AS EQUAÇÃO DO SEGUNDO GRAU ×2-7×+10=0

Answer 1

x²—7x+10=0

a = 1 ; b = —7 e c = 10

∆ = (—7)²—4*1*10

∆ = 49 —40

∆ = 9

x1,2 = (—b±√∆)/2*a

x1,2 = (7±√9)/2*1

x1,2 = (7±3)2

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

x1 = 5

x2 = 7—3/2 = 4/2 = 2

x2 = 2

Sol: { 2 ; 5 }

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