tolong dijawab yahhh pakai cara nya juga... terimakasih

fog (x) = gof (x)
2 (2x+1)^2+(2x+1)+1 = 2 (2x^2+x+1)+1
2 (4x^2+4x+1) + (2x+1) + 1 = 4x^2+2x+2+1
8x^2+8x+2+2x+1+1 = 4x^2+2x+3
8x^2+10x+4 = 4x^2+2x+3
8x^2+10x+4 - 4x^2 -2x -3 =0
4x^2 + 8x + 1 = 0

x1 = -8 + akar ( 8^2 - 4 (4)(1) / 2 (4)
= -8 + akar ( 64 - 16) / 8
= -8 + akar ( 48 ) / 8
= -8 + 4 akar(3) / 8
= -1 + 1/2 akar (3)

x2 = -8 - akar ( 8^2 - 4 (4)(1) / 2 (4)
= -8 - akar ( 64 - 16) / 8
= -8 - akar ( 48 ) / 8
= -8 - 4 akar(3) / 8
= -1 - 1/2 akar (3)