How do you use the quadratic formula and solve $0=10x^2 + 9x-1$ ?

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Answer 1 · 2015-05-12T20:45:05

A quadratic equation is written in the form:
$ax^2 + bx + c = 0$

The given equation $10x^2+9x-1=0$

Where:
$a=10$
$b=9$
$c=-1$

The quadratic formula can be used to find the roots of any quadratic equation.

$x= (-b+- sqrt(b^2-4ac))/(2a)$

So I encourage you to plug in the values from this equation and simplify.

The answers should be $x = −1 and x= 1/10$

How do you use the quadratic formula and solve 0=10x^2 + 9x-10=10x^2 + 9x-1?