Question

(x+a) (x+b) (x+c) is equal to

1, x³ + abc
2, (x+abc)³
3, x³ + (a+b+c)x + abc
4. x³ + (a+b+c)x² + (ab+bc+ca)x + abc​

Answer 1

x^3+(a+b+c)x^2+(ab+bc+ca)x+abc

Answer 2

ans: 4) x^3+(a+b+c)^2+( ab+bc+ac)x +abc

(x+a)(x+b)(x+c)=

x^2+bx+ax+ab(x+c)=

x^3+bx^2+ax^2+abx+cx^2+bcx+acx+abc==

x^3+(a+b+c)x^2+(ab+bc+ac)x+abc