The function f(x, y)=xy(1−10x−4y) has 4 critical points. List them and select the type of critical point. Points should be given as ordered pairs and listed in increasing lexicographic order. By that we mean that (x, y)(x, y) comes before (z, w)(z, w) if x < zx < z or if y< wy< w. 

i dont know it

step-by-step explanation:

option 3 . (5x + 1) - (-10x + 6)

step-by-step explanation:

option 1 :

(4x + 3) + (-9x + 4)

or 4x+3 -9x + 4

or -5x + 7

option 2

(x - 2) - (6x - 9)

or x-2-6x + 9

or -5x + 7

option 3

(5x+ + 6)

or 5x + 1 + 10x -6

or 15x -5

option 4

-4x+2x+7-3x

-7x + 2x + 7

-5x + 7

hence only option 3 did   not satisfy the given simplify expression.

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