Question

find the value of the expression 4/9m²+9/16n²+MN, when m=3/4 and n=2/3​

Answer 1

Answer:

MN=-1/4

Step-by-step explanation:

4/9m² +9/16n²+MN =0

put the value of m=3/4 and n=2/3

4/9×(3/4)²+9/16×(2/3)²+MN=0

4/9×9/16+9/16×4/9+ MN =0

1/4+1/4+MN=0

multiple whole equation by 4

4×1/4+4×1/4+4MN=0

1+1+4MN=0

2+4MN=0

4MN=-2

MN=-2/4

MN=-1/2

Answer 2

Step-by-step explanation:

i hope this answer will help you