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greener1993
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Ive got a few questions id like checking please but i start with the one I got no clue about :S
1)Slove the equation x(x-2)=2-x
So i asumme i slove it to zero, x^2-x-2=0
B)Use the solution to part A and the illustrated grapg to write down the solutions of
I) X(x-2)<2-x
II)X(x-2)>0
III)2-x>3 (greating or the same than)
Iv) x(x-2)<3
The picture is the attached image.
Ones i need checking are.
1) Slove theses simultaneous equations
X-y^2=10
X-2y=2
x=2+2y
(2-2y)+y^2=10 or 2-2y=10-y^2
Y^2+2y-8=0
(y+4)(y-2)
So y=-4 or y=2
for y=-4 x=2-2(-4), x= 10
For y= 2 x=2-2(2), x=-2, The problem here is that they both fit into the x=2+2y equation but not the other one, is this correct?
2) sloved an equation and got 4+-Root 20/2. How can this be simplyfied? i got it down to
2+-2root 2.5
Thank you for your help
1)Slove the equation x(x-2)=2-x
So i asumme i slove it to zero, x^2-x-2=0
B)Use the solution to part A and the illustrated grapg to write down the solutions of
I) X(x-2)<2-x
II)X(x-2)>0
III)2-x>3 (greating or the same than)
Iv) x(x-2)<3
The picture is the attached image.
Ones i need checking are.
1) Slove theses simultaneous equations
X-y^2=10
X-2y=2
x=2+2y
(2-2y)+y^2=10 or 2-2y=10-y^2
Y^2+2y-8=0
(y+4)(y-2)
So y=-4 or y=2
for y=-4 x=2-2(-4), x= 10
For y= 2 x=2-2(2), x=-2, The problem here is that they both fit into the x=2+2y equation but not the other one, is this correct?
2) sloved an equation and got 4+-Root 20/2. How can this be simplyfied? i got it down to
2+-2root 2.5
Thank you for your help
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