Question

What is the vertex of the function x2 - 6x + 8 = 0?

Answer 1

x = -b/2a = 6/2 = 3 and put x =3 in the quadratic expression, and u will get y = -1

Answer 2

i hope @roseromeroo this is of help to u

Answer 3

http://www.mathpapa.com/algebra-calculator.html

This should help you. :)

Answer 4

Any future things.

Answer 5

*Multiply the 1st and last coefficient (1*8 = 8). Find two numbers that give you 8 when multiplied and -6 (middle coefficien) when added/subtracted. The numbers are: -2, -4

First: rewrite the equation with the new middle numbers >

x^2 - 2x - 4x +8 = 0

Sec: group "like" terms and factor both sets of parenthesis >

(x^2 - 2x) - (4x +8) = 0
x(x - 2) - 4(x - 2) = 0
(x - 2)(x - 4) = 0

Third: solve for both "x" variables by setting the parenthesis to equal "0" >

x - 2 = 0
x - 2+2 = 0+2
x = 2

x - 4 = 0
x - 4+4 = 0+4
x = 4

(2, 4)
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