The answer is [ x = 1/7 ].
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3x2+14x+8 = 0 x = -2/3 or x = -4
x2+12x+36=0 2x+12x+36=0 14x+36=0 14x=-36 x=-36/14 x=-2 4/7
Improved answer:5x2+14x+5 = 5-5x2+14x+5 = 0Solve by completing the square:(x+7)2+5 = 0(x+7)2+5-49 = 0(x+7)2 = 44x+7 = + or - the square root of 44x = -7 + or - the square root of 44
x2-14x+45=0(x-9)(x-5)=0x-9=0 & x-5=0x=9 & x=5
14x = 5 x = 5/14