ktoth28
ktoth28
24-11-2019
Mathematics
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0 = x2 + 6x + 9 factor by grouping explain
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Milliecartier
Milliecartier
24-11-2019
To factorise by grouping would require grouping the terms into the form x^2 +2a+ a^2= (x-a)^2. In which case, the a term would be 3, as 2a=6, a=3. Hence the factorised form would be (x-3)^2=0 which means that x-3=0 and hence x=3.
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