x biet : a ) ( 4x + 1)( (3x + 2) + 5x 2 im* bi hat - Dicamon

Question

x biet : a ) ( 4x + 1)( (3x + 2) + 5x 2 im* bi hat e t : a ) (x + 1)(x - 2) - (2x + 2) ^ 2 + 3x ^ 2 = 4 b) (x + 2) ^ 2 + x(3x - 1) - (2x - 1) ^ 2 = 3 b ) (x - 5

Answer

a(4x + 1)(x - 1) - (3x + 2) + 5x ^ 2 = 2; (=4x^ 2 -4x+x-1-3x-2+5x^ 2 -2=0; r = 19x ^ 2 - 6x - 5 = 0; (=)x= 1+v6 1- sqrt 6; (x(2)^ 2 +x(3x-1)-(2x-1)^ 2 =3; (=x^ 2 +4x+y+3x^ 2

Answer

(9k + 1)(k - 1) - (3k + 2) + 5k ^ 2 = 2 5 3 1 + - sqrt(6); (k + 2) ^ 2 + x(3k - 1) - (2k - 1) ^ 2 = 3 +4 + - 11 3 7x + 3 = 3 0 k = 0

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