What is the value of the expression 2 x 2 + 3 x y - Y 2 when x equals 2 and Y equals negative 4
1 answer:
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check the picture below.
so, when we have a line from a 90° angle running perpendicular to the opposite side, like in this case, we end up with three similar triangles, a large one containing the other two, a medium and a small one.
now, using the sides proportions as you see there, of the small and large one, we get that much.
