Question

Упростите выражение (t-5)^2-4t(-10-2t)
Решите систему : х+3у=-12 и 4х-6у=-12

Answer 1

x=-3y-12 и -12y-48-6y=-12;
-18y=46;
y=-2 и x=-6



t^2-10t+25+40t+8t^2= 9t^2+30t+25