charlottekrist
contestada

The curve y=p+qx-2x^2 passes through the point A ((7,6) and (-1,-2). How do I find what p and q are? I tried to differentiate to have one unknown variable, but that doesn't work. So how do I approach this the best way?

Respuesta :

joseaaronlara

Answer:

The answer to your question is:   p = 13     q = 13

Step-by-step explanation:

Obtain 2 equations where the unknown quantities are p and q.

A ( 7, 6)

B (-1, -2)

Equation 1         6 = p + 7q - 2(7)²

                         6 = p + 7q - 98

                         p + 7q = 104                     -------------  (1)

Equation 2       -2 = p - q - 2(-1)²

                        -2 = p - q - 2

                        p - q = 2 - 2

                        p - q = 0                           ---------------- (2)

                        p = q

             

                       p + 7p = 104

                       8p = 104

                       p = 104/8

                       p = 13

                       q = 13

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