Question

encontre f(x) x elevado a 2 +3x -10 para que f(x)=0

Answer 1

x^2+3x-10=0
aplicar bhaskara

x=-b+/- \|b^2-4ac/2a
x=-3+/- \|3^2-4.1.(-10)/2.1
x=-3+/- \|9+40/2
x=-3+/- \|49/2
x=-3 +/- 7 /2

x'=-3+7/2. x''=-3-7/2
x'=4/2. x''=-10/2
x'=2. x''=-5

S= {2,-5}

Espero ter ajudado, qualquer duvida só perfuntar ;)