Question

z is product of x and y. Which of the following equation yield maximize the

value of z.

(A) x+ y = 20 and x-y = 4

(B) x+ y = 20 and x-y = 14

(C) x+ y = 20 and x-y = 0

(D) x+ y = 20 and x-y = 18​

Answer 1

Answer:

option c.

Step-by-step explanation:

if x+y=20 and x-y =0 then x and y have same value, I.e. 20/2=10. and, x²= z= 10²=100.

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