Question

which of the following is a zero of the polynomial x square - 5 x + 6​

Answer 1

Answer:

x²- 5x + 6

putting (-1) in the place of X

(-1)²-5× (-1)+6

-1-5+6

-6+6

0

Answer 2

$\red{\underline{{ \bf Question }}}$

• ᴡʜɪᴄʜ ᴏғ ᴛʜᴇ ғᴏʟʟᴏᴡɪɴɢ ɪs ᴀ ᴢᴇʀᴏ ᴏғ ᴛʜᴇ ᴘᴏʟʏɴᴏᴍɪᴀʟ x² - 5 x + 6

$\underline {\underline{{\purple{ \sf Solution }}}}$

$\green {\bf \implies P(x) = x^{2} - 5x + 6}$

ᴘᴜᴛᴛɪɴɢ ᴛʜᴇ ᴠᴀʟᴜᴇ ᴏғ x ᴀs 1

$\red {\sf \longrightarrow P(1) = (1)^{2} - 5x \times 1 + 6}$

$\red {\sf \longrightarrow P(1) = 1 - 5 + 6}$

$\red {\sf \longrightarrow P(1) = 7-5}$

$\red {\sf \longrightarrow P(1) = 2}$

Thus, 1 ís nσt thє zєrσ σf pσlчnσmíαl х² - 5х + 6

ᴘᴜᴛᴛɪɴɢ ᴛʜᴇ ᴠᴀʟᴜᴇ ᴏғ x ᴀs -1

$\red {\sf \longrightarrow P(-1) = (-1)^{2} - 5 \times -1 + 6}$

$\red {\sf \longrightarrow P(-1) = 1 + 5 + 6}$

$\red {\sf \longrightarrow P(-1) = 12}$

Thus, -1 ís nσt thє zєrσ σf pσlчnσmíαl х² - 5х + 6

ᴘᴜᴛᴛɪɴɢ ᴛʜᴇ ᴠᴀʟᴜᴇ ᴏғ x ᴀs 2

$\red {\sf \longrightarrow P(2) = 2^{2} - 5 \times 2 + 6}$

$\red {\sf \longrightarrow P(2) = 4 - 10 + 6}$

$\red {\sf \longrightarrow P(2) = \cancel{10} - \cancel{10}}$

2 เร thє zєrσ σf pσlчnσmíαl х² - 5х + 6