Question

resolver os cálculos ​

Answer 1

1) letra c

2) letra a

1) 7x²-14 = 0

7x² = 14

x² = 14/7

x² = 2

x = +-√2

S = {+-√2}

2) 4x²-9x = 0

x(4x-9) = 0

x¹ = 0

4x-9 = 0

4x = 9

x² = 9/4

S = {0,9/4}

Boa tarde ❤️

19/12/10