2-1-4-x-2-5-2-1-3-x-2-5-find-coefficient-x-2-

Question Number 176347 by cortano1 last updated on 16/Sep/22

{(2 + \frac{1}{4} x^{2})}^{5} {(2 - \frac{1}{3} x^{2})}^{5}

find coefficient x^{2}

Answered by mr W last updated on 16/Sep/22

5 \times \frac{1}{4} \times 2^{4} \times 2^{5} + 5 \times (- \frac{1}{3}) \times 2^{4} \times 2^{5}

= - \frac{640}{3}

Commented by cortano1 last updated on 16/Sep/22

thanks sir