Question

simplify (2x^2 + 3y^2)^2 - 6x^2y^2​

Answer 1

$\rm{\left(2x^2+3y^2\right)^2-6x^2y^2}$

$\rm{=4x^4+12x^2y^2+9y^4-6x^2y^2}$

$\rm{=4x^4+12x^2y^2-6x^2y^2+9y^4}$

$\rm{=4x^4+6x^2y^2+9y^4}$

Answer 2

2x×2÷3y×2×2-6x2y×2

2×2+3×2×2--6×2×2

answer=88