Question

resolva as equações:
•2x²-14x+20=0
•x²+2x+4=0
•x²-8x+16=0
•x²-8x+12=0
•x²-2x+6=0​

Answer 1

Explicação passo-a-passo:

x = (14 ± √196 – 160 ) ÷ 4 =

(14 + 6) ÷ 4 = 5

(14 – 6) ÷ 4 = 2

xi = 2

xii = 5

s = {2 ; 5}

x = (– 2 ± √4 – 16) ÷ 2 =

s = {}

s = 4 + 4 = 8

p = 4 × 4 = 16

s = {4}

s = 2 + 6 = 8

p = 2 × 6 = 12

s = {2 ; 6}

x = (2 ± √4 – 24) ÷ 2

s = {}