1.

25-30x+9x² equal to what??

Answer»
9x ^{2}  - 30x + 25 \\ 9x {}^{2}  - 15x - 15x + 25 \\ 3x(3x - 5)  - 5(3x - 5) \\ (3x - 5)(3x - 5) \\ (3x - 5) ^{2}
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