Question 12
Given
$$z=y^3(4y^2+2y-1)+4y^2+4\sqrt{5}\,y-14$$
and
$$y=\frac{1}{1-\sqrt{5}},$$
find the exact value of $z$.
$$z=y^3(4y^2+2y-1)+4y^2+4\sqrt{5}\,y-14$$
and
$$y=\frac{1}{1-\sqrt{5}},$$
find the exact value of $z$.
ASMO Math 2022 — Grade 11 — School Round Question 12
ASMO Maths · ASMO Math 2022 — Grade 11 — School Round