Question

If m+n=16 and m^2+n^2=400 find the value of mn

Answer 1

Answer:

mn=(-72)

Step-by-step explanation:

m²+n²=400

m+n=16

Squaring on both the sides

(m+n)²=(16)²

m²+n²+2mn=256

400+2mn=256

2mn=256-400

2mn=(-144)

mn=(-144)/2

mn=(-72)

Therefore, the value of mn is (-72).