Question

ayúdenme xfa...........

Answer 1

M = ( x + 6)^2 + (x + 3) ( x+5) - 2(x + 1)(x + 9)

M =  x^2 + 12x + 36 + x^2 + 8x + 15 - 2 ( x^2 + 10x + 9)

M = x^2 + 12x + 36 + x^2 + 8x + 12 -2x^2 - 20x - 18

M= 2x^2 + 20x + 48 - 2x^2 - 20x - 18

M = 30