7x²+2root14x +2 factorise
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Solution:
7x²+2√14x+2=0
»7x²+√14x+√14x+2=0
»√7x(√7x+√2)+√2(√7x+√2)=0
»(√7x+√2)(√7x+√2)=0
»(√7x+√2)²=0
»√7x+√2=0
»x= - √2/√7
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