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
a) 5-11x²= -8x
b) 4+3x= -x²+2
c)x.(x+2)= -5
d) (2x-1)²=1
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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
-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