Question

Given the polynomial: W(x) = a4 + 2 a3 – 6a-1

Y(x) = 11 a3 – a + a4

Calculate : (i) W(x) + Y(x),
(ii) Also find the value of simplified expression when a = -1​

Answer 1

Answer:

(i)

=a⁴+2a³-6a-1+(11a³-a+a⁴)

= a⁴+2a³-6a-1+11a³-a+a⁴

= a⁴+a⁴-6a-a+2a³+11a³-1

= 2a⁴-7a+13a³-1

(ii)

when a = -1,

2a⁴-7a+13a³-1

=2×(-1)⁴-7×(-1)+13×(-1)³-1

= 2×1-(-7)+(-13)-1

= 2+7-13-1

= 9-14

= -5

Step-by-step explanation:

Hope it helps