Question

1 - Resolva

A) x² - 14x + 49 = 0

B) 4x² -20 + 26 = 0

C) 4y² = 4y - 1

Answer 1

A) -b+-√Δ/2  14+-√196-196/2= 14+0/2= X,= 7
B)4x² -20 + 26 = 0= 2x²-46=x²-23
x²=23     x,=√23  x,,=-√23
c)4y² = 4y - 1 =4y²-4y+1=0
y= 4+-√16-16/2
y=4+-0/2
y=4/2=y,2