Question

factorise x^2-90x+1800

Answer 1

The answer is given below :

${x}^{2} - 90x + 1800 \\ \\ = {x}^{2} - 60x - 30x + 1800 \\ \\ = x(x - 60) - 30(x - 60) \\ \\ = (x - 60)(x - 30)$

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