Question

. Find value 3x³ -5x² +7x if x = -3​

Answer 1

Answer:

57

Step-by-step explanation:

X = 3

so, 3 × 3^3 - 5 × 3^2 + 7× 3

3 × 27 - 5 × 9 + 21

81 - 45 + 21

57

Answer 2

Answer:

After solving we get the answer to be -127

Step-by-step explanation:

Here we have been given a respective polynomial whose value we have to calculate putting x = -3

Now we have the polynomial to be:

$3x^{3} - 5x^{2} +7x$

Now at x = -3 we have

= $3(-3)^{3} - 5 (-3)^{2} + 7(-3)$

= -81 -45 -21

= - 127

The answer is -127