Question

7.- Desarrolla
a) (3+x)²
b) (2x-3)²
c) (x-2y)²​

Answer 1

Respuesta:

a)

$(3 + x) {}^{2} \\ 9 + 6x + x {}^{2} \\ x {}^{2} + 6x + 9$

b)

$(2x - 3) {}^{2} \\ (2x) {}^{2} - 2 \times 2x \times 3 + 3 {}^{2} \\ 4 \times {}^{2} - 2 \times 2x \times 3 + 3 {}^{2} \\ 4 \times {}^{2} - 12x + 9$

c)

$(x - 2y) {}^{2} \\ x {}^{2} - 2x \times 2y + (2y) {}^{2} \\ x {}^{2} - 4xy + 4y {}^{2}$