Question

reduce los siguientes ejer
cicios acerca del cubo de la suma de dos cantidades
$(x + 1) {}^{2} \\ (a + 3) {3} \\ (2x + 3) {3} \\ (2a + 3b) ^{3} \\ (x ^{2} + 2) {3}$
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Answer 1

¡Hola!

Respuesta:

• $x^{2} +2x+1$
• $3a+9$
• $6x + 9$
• $8a^3+36a^2b+54ab^2+27b^3$
• $3x^2+6$

Explicación paso a paso:

$\left(x+1\right)^2 = x^2+2x\cdot \:1+1^2=x^2+2x+1\\\\\\\left(a+3\right)3 = 3a+3\cdot \:3 = 3a+9 \\\\\\\left(2x+3\right)3 = 3\cdot \:2x+3\cdot \:3 = 6x+9\\\\\\\left(2a+3b\right)^3 = \left(2a\right)^3+3\left(2a\right)^2\cdot \:3b+3\cdot \:2a\left(3b\right)^2+\left(3b\right)^3 = 8a^3+36a^2b+54ab^2+27b^3\\\\\\\left(x^2+2\right)3 = 3x^2+3\cdot \:2 = 3x^2+6$