16m-m³ --------- = m²﹢m-20
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![16m-m³ --------- = m²﹢m-20](/uploads/image/z/5540983-7-3.jpg?t=16m%EF%BC%8Dm%26%23179%3B+---------+%3D+m%26%23178%3B%EF%B9%A2m%EF%BC%8D20)
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16m-m³ --------- = m²﹢m-20
16m-m³ --------- = m²﹢m-20
16m-m³ --------- = m²﹢m-20
16m-m³
=-m(m²-16)
=-m(m+4)(m-4)
m²+m-20
=m²+5m-4m-20
=m(m+5)-4(m+5)
=(m+5)(m-4)