Докажите тождество: 35-4х^2-4х=4(х+3,5)(2,5-х)

Question

Докажите тождество:
35-4х^2-4х=4(х+3,5)(2,5-х)

Answer 1

35-4x^2-4x=4(x+3,5)(2,5-x)
35-4x^2-4x=4x+14(2,5-x)
35-4x^2-4x=10x-4x^2+35-14x
35-4x^2-4x=-4x-4x^2+35

Answer 2

35-4x^2-4x=4•(2,5x-x^2+8,75-3,5x)
35-4x^2-4x=10x-4x^2+35-14x
35-4x^2-4x=35-4x^2-4x