How many pieces each 31/6 metres long can be cut fram a cloth 155/2 metres long ?

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Ответ:

hjeffrey168

20.01.2020

Mathematics

Given that,

An equation : y=x^2+9x+20

To find,

The zeros of the above function.

Solution,

To find zero, put y = 0

$x^2+9x+20=0\\\\x^2+5x+4x+20=0\\\\x(x+5)+4(x+5)=0\\\\(x+4)=0\ \text{and}(x+5)=0\\\\x=-4\ \text{and}\ x=-5$

So, the zeros of the above quadratic equation is -4 and -5.

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