Question

9. Simplify the following expression and then find its value for a = -1.
2a²+3a(1-2a³)+a(a+1)
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Answer 1

Answer:

-7

Step-by-step explanation:

Given,

2a²+3a(1-2a³)+a(a+1) = 2a^2 + (3a - 6a^4) + (a^2 + a)

= 2a^2 + 3a - 6a^4 + a^2 + a

= -6a^4 + 3a^2 + 4a

for a = -1,

-6(-1)^4 + 3(-1)^2 + 4(-1) = -6 + 3 - 4 = -7