Question

Cuanto es (3a+4b)al cuadrado

Answer 1

$\left(3a+4b\right)^2$

$\mathrm{Aplicamos\:esta\:formula}:\quad \left(a+b\right)^2=a^2+2ab+b^2$

$a=3a,\:\:b=4b$

$=\left(3a\right)^2+2\cdot \:3a\cdot \:4b+\left(4b\right)^2$

$=9a^2+24ab+16b^2$