bdog2213
21.05.2021 •
Mathematics
Find the value c that will make 9x^2 +30x+c a perfect square trinomial
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Ответ:
Step-by-step explanation:
Given :-
A quadratic equation is given to us.The equation is 9x² + 30x + c .And we need to find out the value of c for which the given trinomial is a perfect square. On looking at the given expression all the terms are having positive signs before them .So we can rewrite it on the basis of ,
Identity :-
Let's try to set the equation on this Identity .
The firsr term is 9x² . We can write it as ,
Hence the middle term here should contain 3 and 2 as their factors. Let's Break the middle term .
Therefore in order to make the whole expression as perfect square 5² must be replaced by c . The expression would become ,
Hence the value of c should be 25 .
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