Let A1=3,A2=5 and |A1+A2|=5.The value of (2A1+3A2).(3A1-2A2) is JEE MAINS 2019 QUESTION fromvectors

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NUMERICALS ON VECTORS CLASS 11 PHYSICS JEE &NEET
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Cos theta ki value humne kyu find ki? And end me -4 and +9 A1A2 ki jagah put kyu ki?

PratikKute
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Why we can't put direct value of vectors? Please mam explain

AnkitGorain-cruf
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Mam I understand everything thing but most of the students will not understand to your explanation because u skip many steps...please make it more easier by telling the formula, where it come from

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