Question

(4x + 9y)² con operacion

Answer 1

$\left(4x+9y\right)^2$

$\mathrm{Aplicar\:la\:formula\:del\:binomio\:al\:cuadrado}:\quad \left(a+b\right)^2=a^2+2ab+b^2$

$=\left(4x\right)^2+2\cdot \:4x\cdot \:9y+\left(9y\right)^2$

$=16x^2+72xy+81y^2$

espero y te sirva :'3