Coefficient of x^2 in (5x^2-1)(9-5x^2). Please solve step by step
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Answered by
1
Answer:
Step-by-step explanation:
Given that,
( 5x² - 1 ) ( 9 - 5x² )
= 5x² ( 9 - 5x² ) - 1 ( 9 - 5x² )
= 45x² - 25x⁴ - 9 + 5x² ( ∵ + × - = - ;; - × + = - ;; - × - = + )
= - 25x⁴ + 50x² - 9.
Hence, the coefficient of x² is 50.
Answered by
0
Answer:
it may help you
Step-by-step explanation:
just open the brackets by solving it and then write the coefficient
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