find the product i)(m²+5mn-3n²)4mn²n
ii) (X+8)(X+7)
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- (m²+5mn-3n²)4mn².
4mn²(m²+5mn-3n²)
4m³n²+20m²n³-12mn⁴
2. x(x+7) + 8(x+7)
x²+7. + 8x+56
x² + 8x+ 63
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