Question

on 91
If x = 243, y = -1024, then evaluate (x - y) (x2 + xy + y).

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Answer 1

ʜᴇʀᴇ'ꜱ yᴏᴜʀ ᴀɴꜱᴡᴇʀ

ᴀᴄᴄᴏʀᴅɪɴɢ ᴛᴏ ᴛʜᴇ qᴜᴇꜱᴛɪᴏɴ:

✎ x = 243

✎ y = - 1024

ᴇᴠᴀʟᴜᴀᴛᴇ:

(x - y) (x² + xy + y)

ꜱᴏ, ʟᴇᴛ ᴜꜱ ꜱᴜʙꜱᴛɪᴛᴜᴛᴇ x ᴀꜱ 243 ᴀɴᴅ y ᴀꜱ -1024

(x - y) (x² + xy + y) → (243 - 1024) (243² + (243 x ( - 1024))+ - 1024)

- 781 (59049 - 248832 - 1024)

ꜱᴏʟᴠᴇ:

- 781 ( - 190807)

→ (- 14,90,20,267)

HOPE THIS HELPS ✌