Question

The coefficient of x2 in the expansion of (x2+2x+3)2+(x2−2x+3)2 is (a)10 (b) 20 (c)−10 (d)−20​

Answer 1

Answer:

b)20

Step-by-step explanation:

${( {x}^{2} + 2x + 3 )}^{2} + {( {x}^{2} - 2x + 3 )}^{2}$

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Answer 2

Answer:

answer b 20

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