What is the value of #8x ^ { 5} + 6x ^ { 4} - 5x ^ { 3} + 10x ^ { 2} + 9x - 1# when #x = - 1#?
1 Answer
Oct 25, 2017
Explanation:
#"substituting "x=-1" into the expression"#
#8(-1)^5+6(-1)^4-5(-1)^3+10(-1)^2+9(-1)-1#
#=(8xx-1)+(6xx1)-(5xx-1)+(10xx1)-9-1#
#=-8+6+5+10-9-1#
#=3#
