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factor the plynomials below. 1.x²- 64
2.x²-25
3.9x²-4
4.4m³-16m
5.81x²-49b⁴
6.M²+14m+49
7.4x²+4x+1 8.
9x²+30x+25
9.25x²-10xy+y²
10.4a²-36a+81​