The expression -2x³ + 6x² - 3x - 9 solved for x = 4 is -53
How to evaluate the expression for x = 4
From the question, we have the following parameters that can be used in our computation:
-2x³ + 6x² - 3x - 9
Also, we have
x = 4
Substitute the known values of x into the expression
So, we have
-2(4)³ + 6(4)² - 3(4) - 9
Expand
-2(4)³ + 6(4)² - 3(4) - 9 = -2(64) + 6(16) - 12 - 9
So, we have
-2(4)³ + 6(4)² - 3(4) - 9 = -128 + 96 - 12 - 9
Evaluate the like terms
-2(4)³ + 6(4)² - 3(4) - 9 = -53
Hence, the expression solved for x = 4 is -53
Question
Solve the expression -2x³ + 6x² - 3x - 9 for x = 4