English
Syllabus

Factorise: x2 - 10x + 21.

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Question

Factorise: x2 - 10x + 21.

Sum
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Solution

x2 - 10x + 21

= x2 - 10x + 21

= x2 - 7x - 3x + 21

= x(x - 7) - 3(x - 7)

= (x - 7)(x - 3)

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Factorisation of a Quadratic Trinomial by Splitting the Middle Term
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