Question 238747
4xsquare -49=0
(2x-7)(2x-7)=0  *** 
(2x-7)*(2x+7) = 0  One is +7
2x-7=0 2x+7=0
2x=7 2x=-7
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x = ±3.5
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{{{4x^2-49 = 0}}}
{{{x^2 = 49/4}}}
x = ±7/2