Question

Find the value of the polynomial 3x^3 - 4x² + 7x - 5 when x = 3​

Answer 1

ANSWER:

3x³-4x²+7x-5

Put x=3

$\large \tt: \implies \: \:3 {(3)}^{3} - 4 {(3)}^{2} + 7(3) - 5$

$\large \tt: \implies \: \:81 - 36 + 21- 5$

$\large \tt \blue{ : \implies \: 61} \: \huge \checkmark$

MORE TO KNOW!!

$\sf \circ \: \: \: \: \: Formula \: to \: find \: sum \: of \: zeroes= \frac{ - (coefficient \: of \: x)}{coefficient \: of \: {x}^{2} } = \frac{( - b)}{a}$

$\sf \circ \: \: \: \: \: Formula \: to \: find \: product \: of \: zeroes= \frac{ constant \: term}{coefficient \: of \: {x}^{2} } = \frac{c}{a}$