Question

a²+ 10a+ 25= a²+ 4a+ 4 + a² + 6a + 9 = ?



qual o resultado ?

Answer 1

a²+10a+25=a²+4a+4+a²+6a+9=

a²+10a+25=2a²+10a+4+9

a²+10a+25=2a²+10a+13

a²+10a-2a²-10a=13-25

a²+0-2a²=13-25

a²-2a²=13-25

-a²=13-25

-a²=-12

a²=12

a=±√12

a=±√4x3

a=±2√3

{a=2√3
{a=-2√3

a€ {-2√3,2√3}