Find the values of k so that the area of the triangle with vertices ( k+1, 1), (4, -3)&(7, -k) is 6 units
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Rest u can solve for k..
Step-by-step explanation:
area of the triangle =1/2 x1(y2-y3)+x2(y3-y1)+x3(y1-y2) subsitute the values x1=k+1 X2=4 x3=7 y1=1 y2=-3 y3=-k 1/2 k+1(-3+k)+4(-k-1)+7(1-(-3))=6 k2-3k+k-3-4k-4+28=12 k2-6k+21=12 k2-6k+9=0 k2-3k-3k+9=0 k(k-3)-3(k-3)=0 k=3