Question

factorise: x²-19x+190​

Answer 1

Step-by-step explanation:

${x}^{2} - 19 {x}^{} + 190 \\ = {x}^{2} - (10 + 9)x + 190 \\ = {x}^{2} - 10x - 9x + 190$

= x(x-10)-9(x-10)

= (x-10)(x-9)

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