Question

calcular as expressoes algebricas

a) m²+ 6 mn + n² quando m= 2/3 e n = -1/2

b) a² + 2a-b/ a+b quando a= -2 e b = 10

me ajudem por favor ( se possivel passo a passo)

Answer 1

a)m²+6mn+n² m=2/3 e n=-1/2

(2/3)² + 6.2/3.(-1/2) + (-1/2)²
4/9 -12/6 + 1/4
16/36-72/36+9/36
-47/36

b)a²+2ab/a+b a=-2 b=10

(-2)²+2.(-2).10/-2+10
4-40/8
4-5
-1