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Adding Squares In The Form: a2 + b2 -
(a-b)2:
A. From algebra we learn:
a2 + b2 - (a-b)2 = 2ab
B. Basically just multiply a and b together then double
it.
C. Examples:
Ex [1] 92 + 32
- 62 = ________
a. The answer is 2(9)(3) = 54.
Ex [2] (25 + 8)2 + 252
- 82 = ________
a. In this example a=33, since
25 + 8 = 33.
b. The
answer is 2(33)(25) = 50 x 33 = 1650. See Multiplying
By 50.