Question

plz answer fast please answer if you can
best answer will marked as brain list answer

Answer 1

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

{(ax)^2 +(by)^2 +2×ax×bx }+ {(ay)^2 +(bx)^2 - 2×ay×bx}

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

a^2x^2 + b^2y^2 +2abxy + a^2y^2 + b^2x^2 - 2abxy

a^2x^2+ b^2y^2 +a^2y^2 +b^2x^2

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

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

Answer 2

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

{(ax)^2+(by)^2+2×ax×bx}+{(ay)^2+(bx)^2-2×ay×by}

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

a^2x^2+b^2y^2+abxy+a^2y^2+b^2x^2-2abxy

a^2x^2+b^2y^2+a^2y^2+b^2x^2

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

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