Question

If P(x) = 2x² - X-1, then P(1)=
​

Answer 1

Answer:

$p(1) = 2 - 1 - 1 = 2 - 2 = 0$

Answer 2

$\huge{\underline{\underline{\sf{\blue{Given\::}}}}}$

• $\sf{P(x)\:=\:2x}^{2}\:{-\:x\:1}$

${ }$

$\huge{\underline{\underline{\sf{\blue{Find\::}}}}}$

• $\sf{P(1)\:=\:?}$

${ }$

$\huge{\underline{\underline{\sf{\blue{Solution\::}}}}}$

• $\bf{P(x)\:=\:2x}^{2}\:{-\:x\:1}$
• $\bf{Now,\:We\:Know\:the\:Value\:of\:x\:is\:1}$

$\large{\green{\sf{Putting\:the\:Value\:-}}}$

${ }$

$\:\:\:\:\:\:\::\:\Longrightarrow\sf{P(1)\:=\:2\:\times\:{(1)}^{2}\:-\:1\:-\:1}$

$\:\:\:\:\:\:\::\:\Longrightarrow\sf{P(1)\:=\:2\:-\:1\:-\:1}$

$\:\:\:\:\:\:\::\:\Longrightarrow\sf{P(1)\:=\:2\:-\:2}$

$\:\:\:\:\:\:\::\:\Longrightarrow\sf{P(1)\:=\:0}$

${ }$

$\:\:\:\:\:\:{\bold{\purple{\dag}}}\:{\underline{\sf{So,\:the\:P(1)\:is\:{\bold{\pink{\mathfrak{0}}}}}}}.$