Diffrent resolution methodes of quations of the second degree?

Question

-Method Direct of the type 0 = a(x - h)^2 + k

-Factorization of the type 0 = (nx + d)(mx + e)

And this quadratic formula x = - b + or - Square Root V(b^2 - 4ac)
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2a
They mentioned something about, Verifying, Exact Roots, Approximation of the roots, " au centieme pres" close to a hundred, form of entiers or decimal numbers and "dixieme pres" close to 10.

What am I do to if I encounter any problems similar to these, please guide me...

Answer 1

just solve them

suppose you have
ax^2 + bx + c = 0

you can try to put them in one of the 3 forms

0 = a(x - h)^2 + k => solution is + or - sqrt(-k/a) + h


0 = (nx + d)(mx + e) solutions are -d/n and -e/m

And this quadratic formula x = - b + or - Square Root V(b^2 - 4ac)
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2a
giuves you also two solutions.


Once you have found the solutions you can verify them by putting the result in the original equation and see if the resulting equations makes sense.

C'est tout