ᴛʜᴇ ᴠᴀʟᴜᴇ ᴏꜰ ᴀ ᴘᴏʟʏɴᴏᴍɪᴀʟ ᴏ(x)ᴀᴛ x=ꜱɪꜱ ᴏʙᴛᴀɴɪɴɢ ʙʏ ᴘᴜᴛᴛɪɴɢ x=ᴀ ɪɴ ᴘ(x)ᴀɴᴅ ɪᴛ ɪꜱ ᴅᴇɴᴏᴛᴇᴅ ʙʏ ᴘ(ᴀ).
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Answer:
(i) 8
(ii) 1
(iii) -6
Step-by-step explanation:
(i) p(x) = 3x² - 5x + 6
p(2) = 3(2)² - 5(2) + 6
= 3(4) - 10 + 6
= 12 - 10 + 6
= 2 + 6
p(2) = 8
(ii) q(x) = x² - 2√2x + 1
q(2√2) = (2√2)² - 2√2(2√2) + 1
= 4×2 - 4×2 + 1
= 8 - 8 + 1
q(2√2) = 1
(iii) r(x) = 5x - 4x² + 3
r(-1) = 5(-1) - 4(-1)² + 3
= - 5 - 4(1) + 3
= - 5 - 4 + 3
= - 9 + 3
r(-1) = - 6
Hope this helps
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