Decomposition factors: (2a + b) &# 178; - (a-b) &# 178;, (X & # 178; + Y & # 178;) (X & # 178; + Y & # 178; - 4) + 4, the process is more detailed

Decomposition factors: (2a + b) &# 178; - (a-b) &# 178;, (X & # 178; + Y & # 178;) (X & # 178; + Y & # 178; - 4) + 4, the process is more detailed

(2a+b)²-(a-b)²=[(2a+b)+(a-b)][(2a+b)-(a-b)]=3a(a+2b) (x²+y²)(x²+y²-4)+4=(x²+y²)²-4(x²+y²)+4=(x²+y²-2)²