Question

Sendo x=3. 1/2 e y= 4/9Determine o valor de:x + yx -yx . yx/ y

Answer 1

Opa

3/2+(3/2×4/9)-(3/2×4/9)×3/2

3/2×4/9 vão ser anulados pois ambos tem valores opostos

Logo, 3/2×3/2=9/4