Question

If A=(-1,0) B=(5,6) find A×B​

Answer 1

Answer:

AB=√(x₁-x₂)²+(y₁-y₂)²

     ⇒√(-1-5)²+(0-6)²=√6²+6²

                                =√36+36

                                =√72

                                =6√2 units

∴AB=6√2 units

Answer 2

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