Question

square + 2 square + 3 square + 2 square is equal to 35 so what is the value of 2 square + b square + c square to 20 square​

Answer 1

²+2²+3²+2²=35

2²+b²+c²=20²

1+4+9+4=35

4+b²+c²=400

b²+c²=400-4

b²+c²=396