Question

find the value of x cube + y cube minus 12 X Y + 64 when X + Y is equal to -4​

Answer 1

Answer:

X = 8, so y2 = 8* 8* 8, so y = 8 root 8

slope of tangent = dy/dx, now 2y dy/dx = 3x2 or dy/dx = 3* 64 / 2* 8root8

= 12/ 2 root 2 = 3root 2, so slope of normal = -1 / 3root 2

now you can find the equation of the normal, using point and slope

y = mx + c, substitute the values to get c and the equation

Answer 2

Answer:

Hope it will help you......xD

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