How do you solve using the quadratic formula method $x^2 – 7x + 9 = 0$ ?

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Answer 1 · 2017-05-20T09:18:23

$x=7/2+-sqrt(13)/2$

Since the equation cannot be simplified further, let $a=1, b=-7, and c=9$ .

Plugging it into the quadratic formula, which is this ↓ $(-b+-sqrt(b^2-4ac))/(2a)$ .

$(-(-7)+-sqrt((-7)^2-4*1*9))/(2*1)$

$(7+-sqrt(49-36))/2$

$(7+-sqrt(13))/2$

$x=7/2+-sqrt(13)/2$

How do you solve using the quadratic formula method x^2 – 7x + 9 = 0x^2 – 7x + 9 = 0?