Question

find the value of polynomial 3 x cube minus 4 x square + 7 x minus 5 when x is equal to-3​

Answer 1

Answer:  -143

Step-by-step explanation: 3x³-4x²+7x-5

Putting x=(-3)

3(-3)³ - 4(-3)² + 7(-3) - 5

=3(-27) - 4(9) - 21 - 5

= -81 - 36 - 21 - 5

= -143

Hope this helps....