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Step-by-step explanation:
264 seconds. is your answer
hope it helps
When a line in a slope graph has no rise/run like this one, there is no slope.
The slope is "Undefined".
(a-b) X (a+b)
= aXa - bXa +aXb -bXb (distributing)
Now, cross product of a vector with itself = 0
so, aXa = 0, bXb = 0
Also, aXb = - bXa
so,
(a-b) X (a+b) = 0 + aXb + aXb + 0
= 2aXb
hence, proved :)
