Question

Using suitable IDENTITY,FIND (√3x-√2y-7)²

Answer 1

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Answer 2

(√3x-√2y-7) ²

Identity:a²-b²-c²= a²+b²+c²-2ab+2bc-2ca

Solution: (√3x)²+(√2y) ²+7²-(2×√3x×√2y) +(2×√3x×√2y) -(2×7×√3x)

3x²+2y²+49-2√6xy+14√2y-14√3x

Hope this helps