Which value of x makes the equation true? X + 7 = -9 A.-16 B.-2 C. 2 D.16

Mathematics

1 answer:

romanna [79]3 years ago

3 0

the answer is:

A. -16

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I like to put these in the form f(x) = 0. We can do that by subtracting the right side. Common factors can be cancelled from numerator and denominator, provided they are not zero.

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If you leave the numerator as (x-3)(4-x), then there are two values of x that make it zero. Because x=3 makes the equation "undefined", it cannot be considered to be a solution.