Question

Escreva as equações do 2 grau na forma reduzida a.ax²+bx+c=0

a) 5-11x²= -8x

b) 4+3x= -x²+2

c)x.(x+2)= -5

d) (2x-1)²=1

Answer 1

A)-11X²+8X+5=0
b)x²+3x+4-2=0
   x²+3X+2=0
C)X²+2X+5=0
D)2X²--2.2X+1+1²=1
    2X²-4X+1-1=0
    2X²-4X=0

Answer 2

a) 5-11x²= -8x
    -11x²+8x+5=0
a=(-11)  b=8  c=5
delta=b²-4.a.c
delta=8²-4.(-11).5
delta=64+220
delta=284

b) 4+3x= -x²+2
   x²+3x+4-2=0
   x²+3x+2=0
a=1  b=3  c=2
delta=b²-4.a.c
delta=3²-4.1.2
delta=9-8
delta=1


c) x.(x+2)= -5
    x²+2x+5=0
a=1  b=2  c=5
delta=b²-4.a.c
delta=2²-4.1.5
delta=4-50
delta= -16.(-1)
delta=16

d) (2x-1)²=1
   4x²-1=0
a=4  b=0  c=(-1)
delta=b²-4.a.c
delta=(0)²-4.4.(-1)
delta=16