Question

Encontre o valor F(x)=x2+3×-10para que f(×)=0

Answer 1

x^2 + 3x - 10 = 0

delta = b^2 - 4.a.c

delta = 3^2 - 4.1. (-10)

delta = 9 + 40

delta = 49

x = -b +-

$\sqrt{49}$

/ 2.a

x = - 3 +- 7 / 2.1

x' = - 3 + 7 / 2

x' = 4 / 2

x' = 2

x" = -3 - 7 / 2

x" = - 10 / 2

x" = - 5