Question

factorise x^2 -10x + 21​

Answer 1

Answer:

$= > (x - 3)(x - 7)$

Step-by-step explanation:

$x {}^{2} - 10x + 21 \\ \: \: \: = x {}^{2} - 3x - 7x + 21 \\ \: \: \: \: \: = x(x - 3) - 7(x - 3) \\ = > (x - 3)(x - 7)$

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Answer 2

Answer:

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