Question

Find the value of ³ + y³- 12y + 64, when +y = -4​

Answer 1

Answer:

$=-6$

Step-by-step explanation:

$y^3+y^3-12y+64$____(i)

$y=-4$

$y^3=(-4)^3$

$y^3=-64$__________(ii)

substitute $y^3$ value in (i)

$=-64+(-64)-12(-4)+64\\=-128+48+64\\=122-128\\=-6$