When a = 2 and B = 3, calculate the values of (a + b) 2 - (a-b) 2 and 4AB respectively, and find out what law (expressed by the formula containing a and b)

When a = 2 and B = 3, calculate the values of (a + b) 2 - (a-b) 2 and 4AB respectively, and find out what law (expressed by the formula containing a and b)

(A+B)²-(A-B)²
=(2+3)²-(2-3)²
=5²-(-1)²
=25-1
=24
4AB=4×2×3=24
It is found that: (a + b) &# 178; - (a-b) &# 178; = 4AB