13 years ago
Shelley

the sum of two numbers is 30. their product is 176.what are the two numbers?please show how you got the answer?

the sum of two numbers is 30. their product is 176.what are the two numbers?please show how you got the answer?
Top 3 Answers
13 years ago
JB
Favorite Answer
x, 30 - x add to 30. The other condition says x (30 - x) = 176. Multiply it out. 30x - x^2 = 176, so x^2 - 30x = -176, complete square by adding 15^2 to both sides (x - 15)^2 = 225 - 176 = 49, take square root x - 15 = 7, so one number is: x = 22 and the other is 30 - x = 8.
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13 years ago
Mrs. H
There probably is a formula but I don't know it, I started at 15 + 15 = 30 But 15 X 15 = 225 too high 10 X 20 = 200 still too high 22 X 8 = 176 and 22 + 8 = 30 Matches! Trial and error
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7 years ago
?
that is wrong i said the sum of 30 and 176
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