हल करना (3x-7y)(9(x)^(2)+21xy+49(y)^(2)) | Equatix - Math Solver

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Example

3(r+2s)=2t-4

a⋅(b-2)=3b

3(r+2s)=2t-4

a⋅(b-2)=3b

Question

$$(3x-7y)(9 { x }^{ 2 } +21xy+49 { y }^{ 2 } )$$