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2014-08-05T19:27:16-03:00
(5x + 3 y^{2} ) ^{2}
25 x^{2} + 2.5x.3 y^{2} + 9 y^{4}
25 x^{2} + 30x y^{2} + 9 y^{4}

(m + 3a) ^{2}
 m^{2} + 2.m.3a + 9 a^{2}
 m^{2} + 6m.a + 9 a^{2}

(x +  a^{2} ) ^{2}
 x^{2} + 2x a^{2} +  a^{4}

( a^{3} + 5b ) ^{2}
 a^{6} + 2. a^{3}.5b + 25 b^{2}
 a^{6} + 10 a^{3}b + 25 b^{2}

( y^{2} +  \frac{2}{3} ) ^{2}
 y^{2} + 2.y. \frac{2}{3} +  \frac{4}{9}
 y^{2} +  \frac{4y}{3} +  \frac{4}{9}
3 4 3