Question

b. f(x) = x2 + 3x – 10

Answer 1

f(x)=x²+3x-10

x² + 3x - 10 = 0

Δ= ( 3 )² - 4 ( 1 ) - 10

Δ= 9 + 40 ( Δ = 49 )

√Δ = 7

( x'= ) - 3 + 7/2 = 2

(x''= ) - 3 - 7/2 = - 5

Os valores de ( x ) = x= -5 ou x = 2