Question

find x so that(1,-5),(-4,5),(x,7) are collinear using determinants​

Answer 1

Answer:

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Answer 2

Answer:

x=-5

Step-by-step explanation:

Three points are collinear if the determinant (with x values in first column, y values in 2nd column and 1 in third column) is zero. Attached a picture with steps.