Help super duper urgent maths 😭😭😭😭😭📚

Alevelhelp.1

Hey I don’t get this…
Why is my answer wrong I did the Cartesian correctly but the ms does some weird stuff

Why??
Btw it’s part a

(edited 11 months ago)

Reply 1

mqb2766

you ididnt multiply the -y by 2.
Apart from that your way is more direct.

(edited 11 months ago)

Reply 2

Alevelhelp.1

Original post by mqb2766

you ididnt multiply the -y by 2.
Apart from that your way is more direct.

Is my way right then if I. Multiplied it by 2

Reply 3

mqb2766

Fairly obviously it will be right as your solution is out by a multiple (on y) of 2.
Your way is more direct as you simply eliminate t^2 without writing it as t=... There is no need to express it as t=...

(edited 11 months ago)

Reply 4

toxicgamage56

Universities Forum Helper

Original post by Alevelhelp.1

Is my way right then if I. Multiplied it by 2

Yes, the mark scheme just used the harder substitution.

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Help super duper urgent maths 😭😭😭😭😭📚

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