find the value of a and b so that x4 +x3 +8x2 +ax +b is divisible by x2 +1.
arushi39:
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x² + x + 7
x² + 1 √ x⁴ + x³ + 8x² + ax + b
x⁴ + x²
x³ + 7x² + ax
x³ x
+ 7x² + 0 + b
7x² + + 7
0
ax - x = 0
So a = 1
b - 7 = 0
b = 7
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