Question

the sum of age of two friends is 20 years 4 years ago the product of their age was 48 show that the statements cannot be true​

Answer 1

Let the ages be x and y

x+y=20---------------(1)

4 years ago......

(x-4)(y-4)=48

xy-4x-4y-16=48

xy-4(x+y)=48+16

xy-4(20)=64

xy=144

x=144/y

substitute in (1)

x+y=20

144/y+y=20

144+y²=20y

y²-20y+144=0

which is impossible to be solved

so, it is impossible

Answer 2

Answer:

let the current of the two people be x and y

so,

X + Y = 20                               X-4 * Y-4 = 48  

X = 20 - Y                                20-Y-4 * Y-4 = 16-Y * Y-4 = 12 - 2Y = 48

if y is -18,                                  -2y = 36

X = 20 - (-18)                             y = -18                        

X = 38                                              

                                               

this statement is wrong because age cannot be negative.

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