Question

помогите с примерами

Answer 1

1)8-у^2+16=24-у^2 2)-9b^2+25c^2+9b^2=25c^2 3)28x-9x^2+9x^2+12x+4=40x+4 4)4x^2+16-(25x^2-40x+16)=-21x^2-40x 5)3x^2+6xy+3y^2-6xy=3x^2+3y^2 6)x^2-6x+9+x^2-9=2x^2-6x