Question

find the polynomial 5x-4x²+3at x=2​

Answer 1

$Given \: polynomial \: p(x) = 5x - 4x^{2} + 3$

$If \: x = 2 \: then \: the \: value \: of \: p(x)$

$p(2) = 5\times 2 - 4 \times 2^{2} + 3$

$= 10 - 4 \times 4 + 3$

$= 10 - 16 + 3$

$= -3$

Therefore.,

$\red{ The \: value \: of \: polynomial }\green { = -3 }$

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Answer 2

Answer:

$\large\bf\underline\red{Question ➡} \\ \\ \bf \: find \: the \: value \: of \: t \: at \: x = 2 \\ \bf \: polynomial \: : - \: \: \: 5x - 4 {x}^{2} + 3t \\ \\ \large\bf\underline\red{Question ➡} \: \\ \\ \sf \: let \: polynomial \: p(x) = 0 \\ \\ \sf \: now \: put \: the \: value \: of \: x = 2 \: in \: p(x) \\ \\\sf 5x - 4 {x}^{2} + 3t = 0 \\ \\ \sf \: 5 \times 2 - 4 {(2)}^{2} + 3t = 0 \\ \\ \sf \: 10 - 16 + 3t = 0 \\ \\\sf 3t \: = 6 \\ \\\sf \: t = \frac{ \cancel6}{\cancel3} \\ \\ \sf \: \large{\boxed{\mathfrak\red{\fcolorbox{magenta}{aqua}{t \: = 2}}}}$