For what value of h is y in the plane spanned by v1 and v2? h=Let v1=25-4, v2=-6-179, and y=-10-27h. Solution aV_1+bV_1=h. from comparing the first coordinates 2a-6b=-10. and from the second coordinates 5a-17b=-27 Solving for a and b we get,a=-2 ,b=1 So -4a+9b=h ie,h=8+9=17.