Question

B) 6x elevado a 2 - x - 5 = 0 C) 25x elevado a 2 + 4x + 2 = 0 D) 3x elevado a 2 + 4x + 2 = 0 E) y elevado a 2 - 16y + 64 = 0

Answer 1

B) 6x²-x-5=0
∆= b²-4ac
∆=(-1)²-4.6.(-5)
∆=+1+120
∆=+121

X= -b ± √∆ \ 2a
X= -(-1) ± √121 \ 2.6
X= +1 ± 11 / 12
X¹= +1+11 / 12
X¹= 12/12
X¹= 1
X²= +1-11/12
X²= -10/12