Question

数学因式规律题观察下列各试:3平方-1平方=4乘以2,4平方－2平方＝4乘以3,5平方－3平方＝4乘以4·····(1)

Answer 1

(n+2)^2-n^2=4(n+1)

(n+2)^2-n^2=n^2+4n+4-n^2=4(n+1)