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Rufina [12.5K]
3 years ago
14

A equação quadrática é escrita na forma a.X² + b.X + c = 0. Na equação quadrática seguinte 9.X² - 2.X + 6 = 0 , a soma dos valor

es dos coeficientes (a + b + c) vale:
Mathematics
1 answer:
-Dominant- [34]3 years ago
8 0

Answer:

a+b+c =13

Step-by-step explanation:

\left\begin{array}{ccccccc}aX^2&+&bX&+&c&=&0\\ \downarrow&&\downarrow&&\downarrow&&\downarrow\\9.X^2&-&2.X &+& 6 &=& 0\end{array}\right  \implies \left\{\begin{array}{ccccccc}a=9\\b=-2\\c=6\end{array}\right

\implies a+b+c = 9+(-2)+6\\=9-2+6\\=7+6\\=13\\\\\therefore a+b+c =13

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Expression consists of numbers, variables, and mathematical operations. The expression f(w)=5(w+4) is equal to f(9)=5(9)+20.

<h3>What is an Expression?</h3>

In mathematics, an expression is defined as a set of numbers, variables, and mathematical operations formed according to rules dependent on the context.

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