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imy786
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Homework Statement
if vector :
line a starts from co-ordinates (0,0) and ends at (5,3)
line b starts from co-ordinates (0,0) and ends at (1,2)
What represents the vector: 2a-5b
Homework Equations
The Attempt at a Solution
I was initially thinking of computing Pythagorus theorem for each of the two lines.
for Line a = square root of (25+9) = square root of 24
for line b = square root of (1+4) = square root of 5
2a-5b = 2 x square root of 6 - 5 x square root of 5
which doesn't seem right...tips would be nice please.
need an answer in the form of an x and y co-ordinate