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Lenair2007
@Lenair2007
August 2022
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helen165
1)3x^2-8x+2=0
a=3 b=(-8) c=2
x12=8+-
√8^2-4*3*2
2*3
x1=
8+
√40
6
x2=
8-
√40
6
x1=2.38
x2=0.27
2)2x^2+6x+7=0/:2
a=2 b=6 c=7
x12=(-3)+-√
3^2-4*1*3.5
2*2
x1=
(-6)+
√20
4
x2=
(-6)-
√20
4
3)4x^2-12x+1=0
a=4 b=(-12) c=1
x12=12+-√
12^2-4*4*1
2*4
x1=
12+12
8
x2=
12-12
8
x1=3
x2=0
4)4x^2+12x+5=0
a=4 b=12 c=5
x12=(-12)+-√
12^2-4*4*5
2 *4
x1=
(-12)+8
8
x2=
(-12)-8
8
x1= (-0.5)
x2=(-2.5)
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Answers & Comments
a=3 b=(-8) c=2
x12=8+-√8^2-4*3*2
2*3
x1=8+√40
6
x2=8-√40
6
x1=2.38
x2=0.27
2)2x^2+6x+7=0/:2
a=2 b=6 c=7
x12=(-3)+-√3^2-4*1*3.5
2*2
x1=(-6)+√20
4
x2=(-6)-√20
4
3)4x^2-12x+1=0
a=4 b=(-12) c=1
x12=12+-√12^2-4*4*1
2*4
x1=12+12
8
x2=12-12
8
x1=3
x2=0
4)4x^2+12x+5=0
a=4 b=12 c=5
x12=(-12)+-√12^2-4*4*5
2 *4
x1=(-12)+8
8
x2=(-12)-8
8
x1= (-0.5)
x2=(-2.5)