Question

HELPPPPP FAST PLEASE

1. what is the excluded value of 2x/ 1-2x
a.0
b.1/2
c.1

2.what are the excluded values of -7/x^2-2x-15
a.0 and 15
b.3 and -5
c.-3 and 5

Answer 1

B and C

Explanation:

Answer 2

b and c

Explanation:

The excluded values are any values of x that make the denominator equal to zero as this would make the rational function undefined.

Equate the denominator to zero and solve for x to obtain excluded values

1

solve 1 - 2x = 0 ⇒ 2x = 1 ⇒ x =
`(1)/(2)` → b

2

x² - 2x - 15 = 0 ← in standard form

(x - 5)(x + 3) = 0 ← in factored form

Equate each factor to zero and solve for x

x - 5 = 0 ⇒ x = 5

x + 3 = 0 ⇒ x = - 3

Excluded values are x = - 3 and x = 5 → c