Question

Resolva

a)x²- 3x - 10 = 0

b)x² - 81 = 0

c)a² - 144 = 0

Answer 1

a)

x' + x'' = -b/a = -(-3)/1 = 3

x' . x" = c/a = -10/1 = -10

×' = 5

x" = -2

b)

x = raiz de 81

x' = +9

x" = -9

c)

a = raiz de 144

a' = 12

a" = -12