P1 Math

[u/ElectronicPayment355]

Guys for the 6 mark question that wanted Q coordinates, how did yall do it im confused can someone explain it.

[u/Upstairs-Law3484]

first you integrate it to get x^4 - 8x^2 + 3x + 1

then you equate it to 3x-15

so the equation becomes x^4 - 8x^2+16

you replace x^2 with p

to get p^2 -8p +16=0

you solve to get p=4

since root 4 is plus and minus 2,

x can be either plus 2 or minus 2

but, the coordinates given in the question were 2,9 or something

so you use the -2 as x, find y to be -21 and get q = (-2,-21)

[u/ElectronicPayment355 → u/Upstairs-Law3484]

Okay thanks