Question

135x2 + 15y2 - 90xy is equal to​

Answer 1

Answer:

${135x}^{2} + {15y}^{2} - 90xy \\ = 15( {9y}^{2} + {y}^{2} - 6xy) \\ = 15(3x - y)(3x - y) \\ = 15 {(3x - y)}^{2}$

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