Question

simplifique as expressoes
a) (x2+y2)2-2(xy)2
b) (x+1).(x+3)-2(x+2).(x+3)+(x+3)2
pfv me ajudem

Answer 1

a) (x²+y²)² - 2(xy)²
x⁴ + 2x²y² + y⁴ - 2x²y²
x⁴ + y⁴

b) (x+1).(x+3) - 2(x+2).(x+3) + (x+3)²
x² + 3x+x+3 - 2(x²+3x+2x+6) + x²+2x3+9
x² + 3x+x+3 - 2x² +10x+12 + x² +6x +9
14x + 15 + 6x + 9
20x + 24
4(5x + 6)