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Math
Algebra
Multiplication
Simplify: (4x+9y)(4x−9y) (1 point) Responses 16x2−81y2 16 x squared minus 81 y squared 16x2+72xy+81y2 16 x squared plus 72 x y plus 81 y squared 8x2−18y2 8 x squared minus 18 y squared 16x2+ 72xy − 81y2
1 answer
16x^2 - 81y^2
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