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tiny-mole [99]
3 years ago
12

Help! Which step is incorrect!

Mathematics
1 answer:
nordsb [41]3 years ago
7 0

Answer:

<h2>(2)</h2>

Step-by-step explanation:

Because

x^2-16=x^2-4^2=(x-4)(x+4)  not  =(x-4)(x-4)

This follows from the formula a^2-b^2=(a-b)(a+b)

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3x^{4}x    + 5x^{2}x    + x - 1

 —————————--------------

                 x    

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3.1   Subtracting a fraction from a whole  

Rewrite the whole as a fraction using  x  as the denominator :

                              3x^3 + 5x                    (3x^3 + 5x) • x

    3x^3 + 5x =  ————————  =  ——————————————

                                   1                                            x      

Equivalent fraction : The fraction thus generated looks different but has the same value as the whole  

Common denominator : The equivalent fraction and the other fraction involved in the calculation share the same denominator

4.1     Pull out like factors :

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5.1   Adding a whole to a fraction  

Rewrite the whole as a fraction using  x  as the denominator :

          1            1 • x

   1 =  —  =  —————

          1              x  

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