Question

Find the value
(iv) 2x4- 5x3 + 7x - 3 when x =2​

Answer 1

$\huge\tt\colorbox{pink}{Answer}$

$x = 2$

$2 {x}^{4} - 5 {x}^{3} + 7x - 3 \\ 2 {(2)}^{4} - 5( {2)}^{3} + 7(2) - 3 \\ 2(16) - 5(8) + 14 - 3 \\ 32 - 40 + 11 \\ - 8 + 11 \\ 3$

Answer 2

$\huge\colorbox{yellow}{{\textbf{\textsf{\color{black}{AnSwEr~↓~↓~}}}}}$

$\bf given: \: p(x) = {2x}^{4} - {5x}^{3} + 7x - 3 \\ \bf when \: \: x = 2 \: \: we \: \: get \: : \\ \bf p(2) = 2(2)^{4} - 5(2)^{3} + 7(2) - 3 \\ \bf = 2(16) - 5(8) + 14 - 3 \\ \bf = 32 - 40 + 11 \\ = { \underline{ \boxed{\bf ~~3~~}}}$

$\huge\color{gold}{\textbf{\textsf{Hope~it~helps..!!}}}$