Question

(ax+by)^2+(ax-by)^2solution

Answer 1

hello friends ,

(ax + by) ^2 + ( ax - by )

(a^2 x^2 )+ (b^2 y^2 ) + 2 abxy  + a^2 X^2 + b^2 y^2  - 2abxy

=  2( a^2 x^2 ) + 2 ( b^2 y^2 )

= 2 ( a^2 x^2 + b^2 y^2 )