Q. a^4 - 13a + 36
Factorise
you sure you don't mean
a^4 - 13a^2 + 36 ?
let u = a^2 and try factoring
u^2-13u+36
which two factors of 36 add to 13?
Factorise
a^4 - 13a^2 + 36 ?
let u = a^2 and try factoring
u^2-13u+36
which two factors of 36 add to 13?