What's the product of these binomials (x-9) (x+2)

Mathematics

2 answers:

Brums [2.3K]2 years ago

6 0

Answer:

x² – 7x – 18

Step-by-step explanation:

stellarik [79]2 years ago

3 0

Answer:

$(x-9)*(x+2)=x^2 - 7x -18$

Step-by-step explanation:

Let's find the solution, but first we need to understand the following:

multiplication of binomials establish that:

$(a-b)*(c+d)=(a*c) + (a*d) + ((-b)*(c)) + ((-b)*(d))$

now, because your binomials are (x-9) and (x+2), using the above we obtain:

$(x-9)*(x+2)=(x*x) + (x*2) + ((-9)*x) + ((-9)*2)$

which can be simplified as:

$(x-9)*(x+2)=x^2 + 2x - 9x -18$

giving the solution:

$(x-9)*(x+2)=x^2 - 7x -18$

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Trava [24]

Answer:

see attached

Step-by-step explanation:

You can do these yourself fairly easily. Copy the figure and the coordinate axes onto a piece of tracing paper (tissue paper or even facial tissue will work, too), then rotate the copied figure 90° clockwise.

Line up the origin of the axes and make sure the axes you drew line up with the ones on the original figure. For 90° clockwise rotation, what was the +y axis will now align with the +x axis. Copy the rotated figure from the tracing paper back to the graph on your problem page in its new location. (You can cut out the figure, if necessary. Just be sure to make note of the position relative to the axes.)

This sort of physical activity reinforces the thinking you need to do to mentally rotate the figures. It is worth the effort.