Объяснение:
1)х+3х+2=6х+1х+2
4x + 2 = 7x + 2
x = 0
2) 4x^2 + 9x + 5 = 4(x + 1)(x + 1.25)
3)(х - 2у)(х + 2у) + 4(х + у)2−8ху = x^2 - 4y^2 + 4(x^2+4y^2+4xy) - 8xy = x^2 - 4y^2 + 4x^2 + 16y^2 + 16xy - 8xy = 5x^2 + 12y^2 + 8xy
Объяснение:
1)х+3х+2=6х+1х+2
4x + 2 = 7x + 2
x = 0
2) 4x^2 + 9x + 5 = 4(x + 1)(x + 1.25)
3)(х - 2у)(х + 2у) + 4(х + у)2−8ху = x^2 - 4y^2 + 4(x^2+4y^2+4xy) - 8xy = x^2 - 4y^2 + 4x^2 + 16y^2 + 16xy - 8xy = 5x^2 + 12y^2 + 8xy