(5x - 1)^2 + 46x = 254 - (3 - 6x)^2 ?

expand, collect like terms, solve the quadratic...

25x^2 - 10x + 1 + 46x = 254 - (9 - 36x + 36x^2) =

25x^2 - 10x + 1 + 46x = 254 - 9 + 36x - 36x^2

61x^2 = 244

x^2 = 244/61

x^2 = 4
x = ± 2

check...practice...

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