Question

(х+3)(х+4)(х+9)(х+12)=3х^2

Answer 1

Ответ:

(х+3)(х+4)(х+9)(х+12)=3х^2

x^2+4x+3x+12(x+9)(x+12)=3x^2

x^2+7x+12x+108(x+12)=3x^2

x^2+19x+108x+1296=3x^2

x^2+127x+1296=3x^2

3x^2-x^2=127x+1296

2x^2=127x+1296