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puteri [66]
3 years ago
13

Expanding each integer in the expression 21x12, the result is [(2x10^1)+(1x10^0)]x[(1x10^1)+(2x10^0)]. Replace the 10s with x's

and then multiply this expression using FOIL. Compare it with the normal integer multiplication method used above: How are they similar? show your work
Mathematics
1 answer:
Sholpan [36]3 years ago
4 0

Answer:

(2x+1)(1x+2) = 2x^2 + 4x + x + 2 = 2x^2 + 5x + 2

i think

Step-by-step explanation:

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How do you do this and what are the answers
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I can answer 1 to 4...
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5 0
3 years ago
One number is 1 more than 2 times another. Their product is 10. Find the numbers.
Taya2010 [7]
Whenever a problem says "one number" and "another number" we can substitute x and y. for this we have x=2y+1 and xy=1. since we know the value of x (2y+1) we can substitute it for the other equation to get (2y+1)y=10. simplify to get 2y^2+y=10. from here you can do a few methods to solve this, but the simplest in my opinion is by factoring. 

In order to factor it must be equal to 0, so we have 2y^2+y-10=0. We factor this and get y=5 (we also get y=-4 but it is an extraneous root). now we can plug that into either equation and find that x=2.

this means our two numbers are 5 and 2
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5 0
3 years ago
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postnew [5]

Answer:

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Step-by-step explanation:

if the given graph is the same as in the attached picture (y=-0.5x-4), then two points only belong to it.

6 0
2 years ago
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