What is the value of f ( − 3a ), if f ( x ) = 2x 2 + 4x ?
1 answer:
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The correct next step Amy could take is to factor (x^2 - 16) on the left side of the equation to yield (x + 4)(x – 4)(x + 2) = 0.
The equation is given as:
The possible next steps are:
1. Expand the equation as follows
2. Express x^2 -16 as a difference of two squares as follows
However, the correct step in this case is to factor x^2 - 16 as a difference of two squares to give
This is so, because the question says Amy is trying to solve for variable x.
This step will ensure that she gets the possible values of x, unlike expanding the whole equation .
Hence, the correct next step is
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By scientific notation I am assuming you mean standard form, as that is used primarily in scientific calculations. The answer in standard form would be
I hope this helps!
I hope this helps!