3 years ago

What is the solution to the quadratic equation x2 + x - 30 = 0?

Mathematics

1 answer:

Nadusha1986 [10]3 years ago

3 0

Answer:

try 3x=30 or 10

Step-by-step explanation:

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Step-by-step explanation:

$y=6x^2-5\\y=17x-\frac{6}{x}$

Let's substitute the first equation into the second one.

$6x^2-5=17x-\frac{6}{x}$

$6x^3-17x^2-5x+6=0$ - Multiply by $x$ and bring all the terms to one side.

I'll use my graphical calculator to solve this but you could factor:

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Now we can substitute these $x$ values into an equation for $y$ .

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