Question

D = x4 + 5x – x2 + x - 1
E = x4 - 4x3 - 2x2 + 2

D + E?

D - E?​

Answer 1

D + E = 2x⁴ + x³ – 3x² + x + 1

D - E = 9x³ + x² + x – 3

Explanation:

D = x⁴ + 5x³ – x² + x – 1

E = x⁴ – 4x³ – 2x² + 2

D + E : D - E :

x⁴ + 5x³ – x² + x – 1 x⁴ + 5x³ – x² + x – 1

+ –

x⁴ – 4x³ – 2x² + 0 + 2 x⁴ – 4x³ – 2x² + 0 + 2

_________________ _________________

2x⁴ + x³ – 3x² + x + 1 0 + 9x³ + x² + x – 3