Răspuns :
a)(x+6)^2
=x^2+2x×6+6^2
=x^2+12x+6^2
=x^2+12x+36
b)(3a-1)^2
=(3a)^2-2×3a×1+1^2
=9a^2-2×3a×1+1^2
=9a^2-6a+1^2
=9a^2-6a×1
c)(3y-2)(3y+2)
=(3y)^2-2^2
=9y^2-2^2
=9y^2-4
d)(4x+3y)(4x-3y)
=(4x)^2-(3y)^2
=16x^2-(3y)^2
=16x^2-9y^2
a)(x+6)^2
=x^2+2x×6+6^2
=x^2+12x+6^2
=x^2+12x+36
b)(3a-1)^2
=(3a)^2-2×3a×1+1^2
=9a^2-2×3a×1+1^2
=9a^2-6a+1^2
=9a^2-6a×1
c)(3y-2)(3y+2)
=(3y)^2-2^2
=9y^2-2^2
=9y^2-4
d)(4x+3y)(4x-3y)
=(4x)^2-(3y)^2
=16x^2-(3y)^2
=16x^2-9y^2