Select the number of solutions the following equation has:
1 answer:
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Answer:
<h2>c. x = -4 or x = 9</h2>Step-by-step explanation:
Domain:
solution:
use <em>(a - b)(a + b) = a² - b²</em>
multiply both sides by (x - 3) ≠ 0
cancel (x - 3)
subtract from both sides
cross multiply
use FOIL
subtract 4x from both sides
combine like terms
change the signs
The product is 0 if one of the factors is 0. Therefore:
<em>add 9 to both sides</em>
<em>subtract 4 from both sides</em>