Question

3) Calcule as expressões:
a) (a + b)2 – (a – b)2 ]


b) (x + 1)2 + (x – 1)2




ME AJUDEM PRFVR

Answer 1

Resposta:

a)

$(a+b)*2-(a-b)*2\\(2a+2b)-(2a-2b)\\2a+2b-2a+2b\\4b$

b)

$(x+1)*2+(x-1)*2\\(2x+2)+(2x-2)\\2x+2+2x-2\\4x$

Espero ter ajudado :)