\(25\left(x+3\right)^2+\left(1-5x\right)\left(1+5x\right)=0\)
\(25\left(x^2+6x+9\right)+1-25x^2=0\)
\(25x^2+150x+225+1-25x^2=0\)
\(150x=-226\)
\(x=-\frac{113}{75}\)
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25 ( x + 3 )2 + ( 1 - 5x )( 1 + 5x ) = 0
25 ( x2 + 6x + 9 ) + 1 + 5x - 5x - 25x2 = 0
25x2 + 150x + 225 + 1 + 5x - 5x - 25x2 = 0
150x + 226 = 0
150x = -226
x = -226/150
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