Question

Hey se dau formulele
(a+b)2=a2+2ab+b2
(a-b)2=a2-2ab+b2
(a+b)(a-b)=a2-b2
Calculati
(2√3-5)²-2(√3+1)²-3√3(√2-3)(√2+3)
Am incercat sa l fac dar nu sunt sigur daca am facut corect

Answer 1

4*4-2*2rad(3)*5+5*5-2(3+2rad(3)+1)-3rad(3)(2-3*3)=16-10rad(3)+25-6-4(rad(3))-2-3rad(3)*(2-9)=41-6-2-14rad(3)+21rad(3)=33+7rad(3)