Without looking to hard, I believe the answer is C. 9to10 cm
(
(
4
/10
x)(6)
/4
x)(2)
/3
Product: 2
/5
x^2
Simplified: You can't simply that.
(I hope this is correct, correct me if I'm wrong.)
3x-2=x+2
2x=4
x=2
...............,
1) n(6;1;-1)=n(A;B;C), point A(2;9;4)=A(x₀;y₀;z₀);
2) common view for a plane according the conditions is: A(x-x₀)+B(y-y₀)+C(z-z₀)=0;
3) after substituted coordinates: 6(x-2)+(y-9)-(z-4)=0; ⇒ 6x+y-z-17=0.