Question

The value of 9xsquare +49ysquare +42xy ,when x=15 and y=3 is ? Please give answer

Answer 1

9x^2+49y^2+42xy
=(3x+7y)^2
=(3×15+7×3)^2
=(45+21)^2
=66^2
=4356

Answer 2

9 x square + 49 y square + 42 xy
x = 15
y = 3

9(15) square + 49(3) square + 42 (15) (3)
2025 + 441 + 1890
=4356

hope so this is correct.