Question

calcule as equacoes aplicando a fórmula geral.

a) ×2+3×-10=

Answer 1

X 2 + 3x -10 = 0
delta = b2 - 4 a c
delta = 3.3 - 4.1.-10
delta = 9 +40
delta = 49 =raiz de 49 = 7
X = -b + ou - 7/2. 1
x' =-3 +7 /2
X = 4 /2
X = 2
x'' = -3 - 7 / 2
x'' = -10 / 2
x'' = -5
S = (-5 ; 2 )