Question

sabendo que a^2 + b^2=30 e ab=6 qual o valore de ( a+b)^2

Answer 1

(a-2b)²

(a)² -2.(a)(2b) +(2b)²

a² -4ab +4b²

a²+4b²=30 e ab=5

a² +4b² -4ab

30-4.(5)

30-20

10