Question 462061
-3x³ + 8x² - 9x - 2, when x = -1
= -3(-1)³ + 8(-1)² - 9(-1) - 2 {substituted -1 in for x}
= -3(-1) + 8(1) + 9 - 2 {evaluated exponents and multiplied}
= 3 + 8 + 9 - 2 {multiplied}
= 18 {added and subtracted from left to right}
<a href = "http://www.algebrahouse.com/" target = "_blank">www.algebrahouse.com</a>