Question

X4+4x3+6x2+4x+9 when x=-1+√2

Answer 1

Answer:

21.8

Step-by-step explanation:

x4+4x3+6x2+4x+9

4x+12x+12x+4x+9

32x+9

32(-1+root2)+9                                           root2 = 1.4

32(-1+1.4)+9

12.8+9=21.8