SOLUTION: which one is correct? {{{10x^2*10x^7=10x^9}}} or {{{10x^2*10x^7=100x^9}}}

Algebra ->  Polynomials-and-rational-expressions -> SOLUTION: which one is correct? {{{10x^2*10x^7=10x^9}}} or {{{10x^2*10x^7=100x^9}}}      Log On


   

Question 282385: which one is correct?
10x%5E2%2A10x%5E7=10x%5E9
or
10x%5E2%2A10x%5E7=100x%5E9
Found 3 solutions by richwmiller, edjones, Alan3354:
Answer by richwmiller(17219) About Me  (Show Source):
You can put this solution on YOUR website!
10x^2*10x^7=100x^9
we have 10*10*x^2*x^7
so we have 100*x^9

Answer by edjones(8007) About Me  (Show Source):
Answer by Alan3354(69443) About Me  (Show Source):
You can put this solution on YOUR website!
10x%5E2%2A10x%5E7+=+10%2A10%2Ax%5E2%2Ax%5E7
= 100x%5E9
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if x = 2:
10x^2 = 40
10x^7 = 1280
40*1280 = 51200
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100*2^9 = 51200
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If x = 1:
10x^2 = 10
10x^7 = 10
10*10 = 100
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100*1^9 = 100