Question

determine as raízes reais y=4x-100

Answer 1

igualando a zero para achar a raiz, temos: $4x - 100 = 0$
$4x = 100$
$x = \frac{100}{4}$
$x = 25$

Answer 2

Quando y = 0

4x - 100 = 0 ==> 4x = 100 ==> x = 25

Quando x = 0

y = 4.0 - 100 ==> y =  - 100


( 25,0) e ( 0, - 100 )