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What are the excluded values of x for x^2-9x/ x^2 -7x-18
?
O x = -9, x = 2
O x = -9, x = 0
Ox= -2, x = 9
O x=0, x= 9

What Are The Excluded Values Of X For X29x X2 7x18 O X 9 X 2 O X 9 X 0 Ox 2 X 9 O X0 X 9 class=

Sagot :

Answer:

3rd option

Step-by-step explanation:

the denominator cannot be zero as this would make the expression undefined.

equating the denominator to zero and solving gives the values that x cannot be.

x² - 7x - 18 = 0 ← in standard form

(x - 9)(x + 2) = 0 ← in factored form

equate each factor to zero and solve for x

x - 9 = 0 ⇒ x = 9

x + 2 = 0 ⇒ x = - 2

then

x = - 2, x = 9 ← are the excluded values

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