Question

$(2x+9)(4x-1)-8x^{2} =59$ решите

Answer 1

$(2x+9)(4x-1)-8x^2 =59\8x^2-2x+36x-9-8x^2 =59\8x^2-2x+36x-8x^2 =59+9\34x=68 /:34\x=2$

Answer 2

$(2x + 9)(4x - 1) - 8 {x}^{2} = 59 \ \ 8 {x}^{2} - 2x + 36x - 9 - 8 {x}^{2} = 59 \ \ 34x - 9 = 59 \ \ 34x = 59 + 9 \ \ 34x = 68 \ \ x = 2$