1.8square - 4 square 2. (x+2)(y+3) 3. (x+5) (y+4) 4. (a+6) (a+7)
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1) 48 2) xy + 3x + 2y +6 3) xy+4x+5y+20
4) a square+ 7a+ 6a+ 42 = a square + 13a + 42
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