Question

(12x+5y)^2 + (12y - 5x)^2 is equal to​

Answer 1

Answer:

144x² - 25y²

Step-by-step explanation:

=> (12x+5y)² + (12y - 5x)²

=> (12x)² - (5y)²

=> 144x² - 25y²

hope it helps you

Answer 2

Answer:

(12x+5y)²+(12y-5x)²=169(x²+y²)

Step-by-step explanation:

(12x+5y)²+(12y-5x)²

=(12x)²+2(12x)(5y)+(5y)²+(12y)²-2(12y)(5x)+(5x)²

=144x²+120xy+25y²+144y²-120xy+25x²

=144x²+25x²+120xy-120xy+25y²+144y²

=169x²+169y²

=169(x²+y²)