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Original post by iizhaque

3x + 5 = 4x² + x

4x²-2x-5=0

x=1.4, -0.9

when x=1.4 y=3(1.4)+5=9.2

when x=-0.9 y=3(0.9)+5=7.7

x = 1.4, y = 9.2

x = -0.9, y = 7.7

i got it wrong

4x²-2x-5=0

x=1.4, -0.9

when x=1.4 y=3(1.4)+5=9.2

when x=-0.9 y=3(0.9)+5=7.7

x = 1.4, y = 9.2

x = -0.9, y = 7.7

i got it wrong

You've not posed the question or how you know you got it wrong, but

3*(-0.9) + 5 is not 7.7

I got:

x=1.4,y=9.2

x=-0.9,y=2.3

x=1.4,y=9.2

x=-0.9,y=2.3

You just made a small mistake by accidently doing 3(0.9) instead of 3(-0.9)

Original post by iizhaque

its still wrong for some reason

What's the actual answer?

Original post by iizhaque

3x + 5 = 4x² + x

4x²-2x-5=0

x=1.4, -0.9

when x=1.4 y=3(1.4)+5=9.2

when x=-0.9 y=3(0.9)+5=7.7

x = 1.4, y = 9.2

x = -0.9, y = 7.7

i got it wrong

4x²-2x-5=0

x=1.4, -0.9

when x=1.4 y=3(1.4)+5=9.2

when x=-0.9 y=3(0.9)+5=7.7

x = 1.4, y = 9.2

x = -0.9, y = 7.7

i got it wrong

I got the same answer as you :/

What's the actual answer?

Can't see the attachment

Original post by chibichibi_xx

Can't see the attachment

Original post by iizhaque

The answers given there are just an example of how you should write them, they're not the actual answers. Used Wolfram Alpha and got x=-0.9,y=2.3 , x=1.4,y=9.2

(edited 4 years ago)

Original post by chibichibi_xx

The answers given there are just an example of how you should write them, they're not the actual answers. Used Wolfram Alpha and got x=-0.9,y=2.3 , x=1.4,y=9.2

i did not use the examples

Original post by iizhaque

i did not use the examples

Maybe it's just the way you've inputted the answers as they are right - maybe you're not supposed to show working and just write the answers? I have no idea how it's still wrong.

Original post by chibichibi_xx

Maybe it's just the way you've inputted the answers as they are right - maybe you're not supposed to show working and just write the answers? I have no idea how it's still wrong.

yeah that would be my suggestion, it may just want the answers

Original post by laurawatt

yeah that would be my suggestion, it may just want the answers

ive tried it before its probably just the website

Original post by Matureb

If you do not do any rounding to 2dp until the end, the y values are 9.19 and 2,31. Does that work?

^^^^ Yeah, the question said to round to 2dp (for both x and y), and you've only entered answers to 1dp - try these answers.

It should be to 2 decimal placesThe answer is: x=1.40, y=9.19x= -0.90, y= 2.31(got me 5/5)

x=1.40,y=9.19x=-0.90,y=2.31

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