3-4x+20 solve the following equatio...
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3-4x+20 solve the following equation by factorization met

JEE/Engineering Exams
Maths
Solution
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( x^{2}-4 x-7=0 ) ( Rightarrow x^{2}-4 x=7 ) add on sq. of half of the middle cooflicient to both side ( left(4 div 2=2 text { & } 2^{2}=4right) ) ( Rightarrow x^{2}-4 x+4=7+4 ) 495 ( (x-2)^{2}=11 ) xoot on each side ( x-2=+sqrt{11} ) ( x=sqrt{11}+2 ) ( x=5 cdot 317 ) Solve for ( x ) twice ( x=-sqrt{11}+2 ) ( m-x=-1 cdot 317 )
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