NCERT
• The factorisation done by using the distributive law (property) is called the common factor method of factorisation. • Sometimes, many of the expressions to be factorised are of the form or can be put in the form: a2 + 2ab + b2, a2 – 2ab + b2, a2 – b2 or x2 + (a + b) x + ab. These expressions can be easily factorised
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