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zavuch27 [327]
3 years ago
10

What are the values of c makes x^2 + 6x + c a perfect square trinomial? 3 6 9 12

Mathematics
1 answer:
alex41 [277]3 years ago
6 0

Answer:

<h2>c = 9</h2>

Step-by-step explanation:

(a+b)^2=a^2+2ab+b^2\\\\\text{We have}\ x^2+6x+c=x^2+2(x)(3)+c\\\\\text{Therefore}\ c=3^2=9\\\\x^2+2(x)(3)+3^2=(x+3)^2

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recall in a perfect square trinomial, the middle term is the tale-tell guy, we know the middle term is the product of 2 and the two other guys without the exponent, so in this case 6x = 2*√x² * √c.


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3 years ago
In a school 40% are boys and 900 are girls. find the total number of students of the school and the number of boys
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