Question

rezultatul calculului (2-√3)²*(2+√3)² este. Va rog urgent, 25 de puncte

Answer 1

=(4-4√3+3)*(4+4√3+3)=
=(7-4√3)*(7+4√3)=
=7²-(4√3)²=
=49-48=
=1

Answer 2

=(4-4√3+3)*(4+4√3*3)=
=(7-4√3)(7+4√3)=
=7^2-(4√3)^2=
=49-48=
=1

(a+b)^2=a^2+2ab+b^2
(a-b)^2=a^2-2ab+b^2
(a+b)(a-b)=a^2-b^2