physics vectors class 11
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Explanation:
a = 4i + 3j
b = -4i -3j
a - b = (4i + 3j) - (-4i - 3j)
= 4i + 3j +4i +3j
= 8i +6j
magnitude of (a - b)^2= 8^2 + 6^2
(a - b)^2= 64+36
(a - b)^2 = 100
taking square root on both sides
(a - b) = 10
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