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Find two numbers a and b whose sum a+b is 3 and whose difference a-b is 7 

          Find two numbers a and b whose sum a+b is 3 and whose difference a-b is 7

Added by Amanda B.

Calculus: Early Transcendentals
Calculus: Early Transcendentals
James Stewart 8th Edition
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Find two numbers a and b whose sum a+b is 3 and whose difference a-b is 7
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Transcript

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00:01 Hi, here in this question we are given that the sum of two numbers a plus b equals to 2 whereas the difference a minus b equals to minus 4.
00:13 Now here let this be equation 1 and this be equation 2.
00:17 So adding equation 1 and 2 here we have a plus b equals to 2 plus a minus b equals to minus 4.
00:28 Plus and minus b cancels each other we have 2 a equals to minus 2.
00:33 So a equals to minus 1.
00:35 So the first number is minus 1.
00:37 Now similarly another number which is b equals to 2 minus a...
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