Mathematics: How to solve using the quadratic formula. & answer.

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How to solve using the quadratic formula. &

Ответ:

DisneyGirl11

10.01.2022

Quadratic formula

for the equation
ax^2+bx+c=0
x= $\frac{-b+/- \sqrt{b^{2}-4ac} }{2a}$

we are given
x^2-4x+3=0
we don't need to use quadratc formula, we just factor into
(x-3)(x-1)=0
x=3 and 1
but if you want to use quadratic, ok

x^2-4x+3=0
a=1
b=-4
c=3
input
x= $\frac{-(-4)+/- \sqrt{(-4)^{2}-4(1)(3)} }{2(1)}$
x= $\frac{4+/- \sqrt{16-12} }{2}$
x= $\frac{4+/- \sqrt{4} }{2}$
x= $\frac{4+/- 2}{2}$
x=2+/-1
x=2+1 or 2-1
x=3 or 1